2011 trailering guide › teams › repository › ...Yukon XL 9600 Yukon 8500 Sierra 2500HD 17,800 13,000 Sierra 1500 10,600 10,700 Yukon XL Denali 7900 Yukon Denali 8300 Acadia 5200

GMC’s Professional Grade vehicles are long renowned for their engineering excellence and refinement. They come in a variety of sizes and offer a wide range of powertrains and options designed to get the job done efficiently and safely. Trailer weight ratings (TWRs) range from 2900 lbs. for a 4-cylinder 4WD Canyon Extended Cab to 21,700 lbs. on a 3500HD 4WD Regular Cab Long Box Dual Rear Wheel with a gooseneck or fifth wheel hitch.

Trailer towing is not limited to just work and commercial buyers. Many customers in the personal-use segment of the market use their vehicles for more than hauling people and cargo. These customers have boats, recreational trailers, snowmobiles and many other toys that require a capable vehicle to safely transport all of these items.

This guide gives you the tools you need to properly spec GMC models for unique usage scenarios and fulfill a customer’s particular trailering needs. That starts by asking the right questions to determine exactly what is expected of the vehicle.

2011 trailering guide

This material is not legally approved for use in any advertising. It is intended for use by dealership employees only and is not to be disseminated to, or reviewed by, consumers. Information contained herein is designed to be as comprehensive and factual as possible. General Motors reserves the right, however, to make changes at any time, without notice, in materials, equipment, specifications, models and availability. Copyright 2010 General Motors Company. All Rights Reserved. No portion of this work may be reproduced, rebroadcast or redistributed, in whole or in part, without the express written permission of General Motors Company. PDF created December 2010.

2011 gMC trailering guide 1

table of Contents

Right Vehicle for the Job . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Maximum Trailer Weight Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Trailering 101 – What You Need to Know

Definitions of Commonly Used Trailering/Hauling Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Tongue Weights/Load Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Will This Vehicle Pull My Trailer? – 4 Easy Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7

Ensuring the Proper Trailering Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Trailering Worksheet and Weight Calculator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Trailering/Hauling Specification Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10–17

Connecting for Safety on the Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-19

Trailering Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Trailering Tips and Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-22


right vehiCle for the job

• engines – From the Vortec 2.9L I4 with 185 hp, to the Duramax 6.6L Turbo Diesel V8 with a whopping 765 lb.-ft. of torque, there is a GMC engine for almost any job.

• transmissions – GMC offers 4-speed and 6-speed automatic transmissions with innovative features such as a Tow/Haul mode for enhanced trailer towing convenience.

• trailering Packages – Factory-installed packages designed to improve the performance of the vehicle when towing a trailer. In addition to a trailer hitch platform and all necessary wiring connections, trailering packages may also include features like an automatic locking rear differential, an external transmission oil cooler, a heavy duty engine cooling package and an external engine oil cooler. Other trailering options may include an integrated trailer brake controller, trailer towing mirrors and rear backup camera.

• drive type – The type of drive system has an impact on how the vehicle drives and handles, especially when towing a trailer.

– rear-Wheel drive – The addition of cargo or trailer tongue weight increases weight on the rear, increasing traction. Rear-wheel-drive vehicles typically have lighter chassis weights, resulting in better fuel economy than all-wheel-drive and four-wheel-drive vehicles. The lighter chassis allows you to dedicate more of the vehicle’s load-carrying capacity to cargo weight.

– front-Wheel drive – Provides good traction on dry pavement. Since the trailer adds weight to the rear of the vehicle, proper trailer loading is important to maintain proper handling of the vehicle. If your customer plans to tow frequently, recommend the all-wheel drive model.

– four-Wheel drive – Provides the option of outstanding traction on demand. When set in Auto 4WD mode, the system detects wheel slippage and automatically transfers torque to the front wheels. When conditions warrant, the system automatically returns to two-wheel drive.

Another configuration that can make a difference is that when the transmission is placed in 4HI, it locks the front and rear together for more traction. 4LO helps in really difficult situations such as deep mud or snow.

– all-Wheel drive – Is a good option for customers who trailer over wet or snow-covered roads on a regular basis. Advanced AWD designs automatically distribute power to front and rear axles, allowing every drive wheel to provide power. This gives the vehicle ideal traction to take on less-than-ideal road conditions.

– automatic locking rear differential – The Eaton G80 locker locks rear wheels side-to-side in low traction situations.

When a vehicle is used for hauling and trailering, safety is a primary concern. If the vehicle is not up to the task, not only can the trip be uncomfortable, it can also be dangerous. Fortunately, GMC vehicles are available in a wide range of configurations and offer comprehensive equipment to make the job easier. We’ll explain many of these features throughout this guide, but for now, let’s look at the basics.


MaxiMuM trailer Weight ratings by Model (lbs.)

0 5000 10,000 15,000 20,000

Yukon XL 9600

Yukon 8500

Sierra 2500HD 17,80013,000

Sierra 1500 10,60010,700

Yukon XL Denali 7900

Yukon Denali 8300

Acadia 5200

Canyon 6000

Terrain 3500

Savana 1500 Cargo 6800

Savana 2500 Cargo 10,000

Savana 3500 Cargo 10,000

Savana 1500 Passenger 6200



Sierra 1500 Hybrid 6100

Sierra Denali 1500 9600

Sierra Denali 2500HD 17,10013,000

Sierra 3500HD 21,70017,000

Sierra Denali 3500HD 21,30017,000

25,000

Conventional HitchGooseneck or Fifth Wheel Hitch


trailering 101 – What you need to knoW

definitions of CoMMonly used trailering/hauling terMsTo effectively spec a full-size truck for proper trailering and hauling, you need to know the language. The trailer towing community uses words and acronyms that provide a kind of shorthand to getting things done right. The list below defines commonly used trailering and hauling terms.

Curb Weight (CW) – The weight of an empty vehicle without occupants or cargo, but including fluids and all equipment.

gross axle Weight rating (gaWr) – The maximum allowable weight to be carried by an axle. The GAWR can vary between front and rear axles. Trailer tonque weight has a large effect on rear GAWR. If weight is applied well behind the tow vehicle rear axle centerline, it will have a greater than expected effect on loaded rear axle weight. Depending upon the tow vehicle wheelbase and the distance to the hitch ball, the multiplier is usually about 1.5.

gross Combination Weight rating (gCWr) – The maximum allowable weight of the vehicle and trailer combination. The GCWR includes the weight of the driver, passengers, fuel, optional equipment and cargo in both vehicles.

gross vehicle Weight (gvW) – The total loaded weight of the vehicle (tow vehicle or trailer). This is everything that contributes to the weight of the vehicle, including the curb weight of the vehicle, driver, passengers, fuel, cargo, tongue weight of the trailer, weight of the hitch and all optional equipment.

gross vehicle Weight rating (gvWr) – The maximum allowable weight of the vehicle (tow vehicle or trailer).

kingpin Weight – The static weight placed on the hitch and carried by the tow vehicle when towing a fifth wheel or gooseneck trailer. It is typically about 20 to 25 percent of loaded trailer weight. Note that the way a trailer is loaded can affect the kingpin weight.

Payload (Pl) – The amount of weight that may be carried by the vehicle including driver, passengers, cargo and the tongue weight of the trailer. Also includes any options, factory or aftermarket, and the weight of any upfit body modifications.

trailer Weight rating (tWr) – The maximum allowable trailer weight a vehicle can tow. This number is generally determined by subtracting the vehicle weight from the GCWR. At the TWR for a properly equipped vehicle, it should be able to accelerate and merge with traffic, climb typical inclines at highway speeds, have control on varying road surfaces and stop effectively within a reasonable distance.

tongue (or hitch) Weight – The static weight placed on the hitch and carried by the tow vehicle. It is typically 10 to 15 percent of loaded trailer weight. Note that the way a trailer is loaded can affect the tongue weight.


tongue Weights/load distribution

The tongue weight (or kingpin weight) of any trailer is an important figure to measure because it affects the total or gross weight of the tow vehicle. Many trailer owners estimate trailer weight from things such as past experiences, discussions with other trailer owners and dry weight figures found in sales brochures. These methods may lead to very low estimates. It is very important that the customer knows his actual trailer weight, loaded as ready for a trip.

After the trailer is loaded, weigh the trailer and tongue weight separately to see if the weights are proper. If they are not, moving items fore-and-aft in the trailer may correct the imbalance.

The trailer tongue weight should generally be 10 percent to 15 percent of the total loaded trailer weight. For fifth wheel or gooseneck trailers, the kingpin weight should generally be 20 percent to 25 percent of the trailer weight.

A general rule of thumb is to distribute 60 percent of the load over the front half of the trailer and evenly from side-to-side. Once the weight is distributed properly, all cargo should be secured to prevent the load from shifting.

tongue Weight

trailer Weight

loW tongue Weight

If the tongue weight is too low, it can lead to trailer sway.

high tongue Weight

If the weight is too high, it can overload the rear suspension of the vehicle negatively affecting steering and handling and compromising durability.

The Online Order Guide features helpful tools to help you determine payload and towing

capabilities based on the model and options selected.


Will this Pull My trailer? – 4 easy stePs

steP 1 – CalCulate gross PayloadPayload capacity is the maximum allowable weight of loaded cargo and aftermarket equipment a vehicle can carry.

What is the combined weight of everything in and on the vehicle:

• in the bed/cargo area?

• in the cab?

• on the roof?

• mounted on the vehicle?

Including the weight of:

• all aftermarket equipment and accessories, (i.e. camper shell, slide-in camper, tool boxes, roof luggage carrier, snow plow, etc.).

• vehicle fuel (approximately 6 lbs./gal.).

• all personal gear and cargo.

• all occupants (150-lb. average/person).

• tongue (or kingpin) weight (not more than 10–15% of loaded trailer weight for tongue weight, or not more than 20–25% of loaded trailer weight for kingpin weight).

Not including:

• weight of vehicle.

• weight of trailer nor its contents.

steP 2 – CalCulate gross vehiCle WeightGVWR is the maximum amount a tow vehicle may weigh— in other words, the fully loaded vehicle weight. This does not include the weight of what is being towed, but it does include the trailer tongue (or kingpin) weight (as indicated in Step 1) because this weight is carried by the tow vehicle.

From the vehicle’s invoice determine the vehicle ship weight and Gross Vehicle Weight Rating. See example below.

To determine if the payload and vehicle weight are under the maximum allowable GVWR, complete this simple formula:

steP 2

Curb Weight __________ +

Payload __________ =

gross vehicle Weight (gvW) ___________

Match this answer against the tables on pages 10-17. Is it below the maximum allowable GVWR?

yes – Continue to step 3.

no – Step up vehicle selection and recalculate.

steP 1

total gross Payload ___________

Match this answer against the chart on pages 10-17. Is it below the maximum allowable payload capacity?



steP 1

steP 2


Will this Pull My trailer? – 4 easy stePs

steP 3 – CalCulate gross trailer WeightEvery GMC truck has a predetermined maximum allowable trailer weight.

What is the combined weight of everything in and on the trailer?

Including the weight of:

• the trailer itself.

• LP contained in tanks.

• fresh (faucet) water in tanks.

• gray (down drain) water in tanks.

• black (down toilet) water in tanks.

• all equipment, cargo, gear.

• anchors.

• fuel in tanks that run generators, boat motors and other equipment.

• food (dry, wet, frozen).

• clothing.

• items tied down or strapped to the outside (i.e. bikes, ladders, mopeds, fire wood, etc.).

steP 4 – CalCulate gross CoMbination WeightGCWR is the maximum allowable weight of a completely loaded vehicle and trailer.

To determine the GCWR, complete this simple formula:

steP 3

loaded trailer Weight ___________

Match this answer against the chart on pages 10-17. Is it below the Trailer Weight Rating (TWR)?



steP 4

gross vehicle Weight (gvW) __________ +

loaded trailer Weight ___________ =

gross Combination Weight rating (gCWr) ___________

Match this answer against the chart on pages 10-17. Is it below the maximum allowable GCWR?

yes – You have determined that you have matched the correct truck to the customer’s trailering needs. Congratulations! Now ensure the truck has the proper equipment.


steP 3

steP 4


ensuring the ProPer trailering equiPMent

MatChing the vehiCle to the CustoMerWhen a customer walks into your showroom looking for a vehicle to handle heavy loads, it is up to you to help match the vehicle that best suits the customer’s needs. The best way to get to know a customer and what type of vehicle is needed is to ask questions about the types of loads they plan to haul.

It may not be much of a challenge to determine whether they will be better suited with an SUV, pickup or crossover, but determining ideal equipment for trailering and hauling requires further questioning.

Q. Do you trailer?

If the answer is yes, ask about what the customer is trailering. Is it a boat? A car trailer? A camper? A combination of these items? Weight variations between these types of trailers can be significant. And don’t just focus on the weight of the trailer; ask if additional cargo is expected to be loaded in the trailer and in the vehicle.

The key is to understand the total loaded weight of both the tow vehicle and the trailer—the gross combination weight. The customer may learn he cannot simply hitch a trailer that weighs the same as his tow vehicle’s TWR and stay within all vehicle ratings.

Q. Do you haul?

A “yes” answer here also requires follow-up questions. Clearly, a single motocross bike is much lighter and easier to manage than a slide-in camper. And again, be sure to ask about other items expected to be hauled. For example, you may have customers that say that they will only haul a single motocross bike, but with further questioning, you may find out that tools, spare parts, extra gasoline, etc. may be a part of the load. Also, if customers haul several people, be sure to include the weight of passengers and their cargo.

Q. Do you haul and trailer at the same time?

This important question is commonly overlooked. Typically, customers and sales consultants are most concerned with equipping the vehicle to be able to tow the customer’s trailer, but overlook additional items that may be hauled. For example, a customer could perfectly equip the vehicle for hauling a large boat trailer, but forget to inform the sales consultant that a quad will be in the truck bed in addition to towing the trailer. Be sure to ask the right questions to determine the maximum load, even if the vehicle is not regularly loaded to that capacity. And don’t forget to ask about the number of passengers.

Again, the key is to understand the total loaded weight of both the tow vehicle and the trailer—the gross combination weight.

folloW-uP questionsOnce you have answers to the basic questions, be sure to follow up with these questions to get further information on how the customer will use their vehicle.

Q. How much time will be spent trailering?

If the customer plans to trailer only occasionally, every available towing option may not be needed.

Q. What type of conditions will frequently be encountered?

If the vehicle is used for trailering in conditions such as steep grades, extreme temperatures or high altitudes, make sure the powertrain and cooling system are up to the task.

Q. Are special conditions requiring additional traction likely to be encountered?

Boat ramps, snow-covered roads, off-road conditions and unfinished roads are all situations where the vehicle will need additional traction. An all-wheel-drive or four-wheel-drive vehicle, or a vehicle equipped with an automatic locking rear differential may be better for these customers.

Q. Do I need trailer brakes?

Trailer brake requirements vary from state to state; be sure to check your local laws. However, trailer brakes are generally required for all load trailers weighing over 3000 lbs. On GMC models, trailer brakes are required on loaded trailers weighing above 2000 lbs. on Sierra and Yukon, and above 1000 lbs. on other models. On Sierra and Yukon models, GMC offers an optional integrated trailer brake controller for trailers equipped with electric trailer brakes.

Q. Will payload and/or trailering needs increase in the future?

The vehicle your customer selects may be just fine for hauling the current load, but ask if hauling needs will increase in the future.

You need to know:

• What is the height and width of the trailer?

• What type of hitch is required?

• Is the trailer equipped with electric trailer brakes?

• What type of electrical connection does the trailer require?


trailering Worksheet and Weight CalCulator

trailering WorksheetCopy and use this form to determine requirements.

Customer name: Date:

Do you trailer? Yes No What do you trailer? (Example: boat, camper, fifth wheel, etc.)

Approx. loaded trailer weight: Tongue/kingpin weight: Trailer height and width:

What type of hitch is required? Is trailer equipped with electric trailer brakes? Yes No

What type of electrical connection does the trailer require?

Do you haul? Yes No What do you haul? (Example: building materials, motorcycle, etc.)

Approximate cargo weight:

Do you haul and trailer at the same time? Yes No Time spent trailering? (Example: occasional, often, everyday)

What type of conditions are most often encountered? (Example: high altitude, steep grades, extreme temperatures)

Special conditions requiring additional traction: (Example: boat ramps, off-road, etc.)

Note: For detailed slide-in camper loading information, refer to your 2011 GMC Online Order Guide. A link is provided on the GMC home page.

Weight CalCulatortotal Cargo and trailering requireMents

total gross Payload to be carried (include tongue/kingpin weight): __________ lbs.

gross vehicle Weight (gvW): __________ lbs.

loaded trailer Weight: __________ lbs.

gross Combination Weight rating (gCWr): __________ lbs.

online CalCulatorThe Online Order Guide features helpful tools to help you determine payload and trailering capabilities based on the model and options selected. To use this tool, navigate your web browser to the Online Order Guide (http://eogld.ecomm.gm.com), select a model and follow the steps.


trailering/hauling sPeCifiCation Chart trailer Weight rating (tWr) horsePoWer @ rPM axle Max. ball 5th Wheel engine torque (lb.-ft.) @ rPM ratio Payload gvWr hitCh hitCh gCWr

ACADIA

2WD 3.6L SIDI V6 Gas (LLT) 288 @ 6300 3.16 N/A 6411 5200 N/A 9500 270 @ 3400

AWD 3.6L SIDI V6 Gas (LLT) 288 @ 6300 3.16 N/A 6459 5200 N/A 9700 270 @ 3400

CANYON (INCOmplete mODels exCluDeD)

2WDRegularCab Vortec 2.9L DOHC I4 (LLV) 185 @ 5600 3.73 1429 4850 2400 (man.); N/A 6000 (man.); 190 @ 2800 3400 (auto.) 7000 (auto.)

3.7L DOHC I5 (LLR) 242 @ 5600 3.73 1429 4850 4000 N/A 8500 242 @ 4600

2WDExtendedCab 2.9L DOHC I4 (LLV) 185 @ 5600 3.73 1384 5000 2200 (man.); N/A 6000 (man.); 190 @ 2800 3200 (auto.) 7000 (auto.)

3.7L DOHC I5 (LLR) 242 @ 5600 3.73 1384 5000 5500 N/A 9500 242 @ 4600

5.3L V8 (LH9) 300 @ 5200 3.42 (Z85/ZQ8); 1384 5000 6000; N/A 10,400 320 @ 3600 3.73 (Z71) 4000 (ZQ8)

2WDCrewCab 2.9L DOHC I4 (LLV) 185 @ 5600 3.73 1216 5000 3000 N/A 7000 190 @ 2800

3.7L DOHC I5 (LLR) 242 @ 5600 3.73 1216 5000 5500 N/A 9500 242 @ 4600

5.3L V8 (LH9) 300 @ 5200 3.42 (Z85/ZQ8); 1216 5000 6000; N/A 10,400 320 @ 3600 3.73 (Z71) 3800 (ZQ8)

4WDRegularCab 2.9L DOHC I4 (LLV) 185 @ 5600 3.73 1410 5150 2100 (man.); N/A 6000 (man.); 190 @ 2800 3100 (auto.) 7000 (auto.)

3.7L DOHC I5 (LLR) 242 @ 5600 3.73 1410 5150 4000 N/A 9000 242 @ 4600

4WDExtendedCab 2.9L DOHC I4 (LLV) 185 @ 5600 3.73 1366 5300 1900 (man.); N/A 6000 (man.); 190 @ 2800 2900 (auto.) 7000 (auto.)

3.7L DOHC I5 (LLR) 242 @ 5600 3.73 1366 5300 5500 N/A 9800 242 @ 4600

5.3L V8 (LH9) 300 @ 5200 3.42 (Z85); 1366 5300 6000 N/A 10,400 320 @ 3600 4.10 (Z71)

4WDCrewCab 3.7L DOHC I5 (LLR) 242 @ 5600 3.73 1170 5300 5500 N/A 9800 242 @ 4600

5.3L V8 (LH9) 300 @ 5200 3.42 (Z85); 1170 5300 6000 N/A 10,400 320 @ 3600 4.10 (Z71)

sAVANA 1500 CARGO

RWDRegular Vortec 4.3L V6 Gas (LU3) 195 @ 4600 3.42 2329 7300 4300 N/A 9500Wheelbase 260 @ 2800

Vortec 5.3L V8 310 @ 5200 3.73 2092 7300 6700 N/A 12,000 Gas/FlexFuel (LMF) 334 @ 4500

AWDRegular Vortec 5.3L V8 310 @ 5200 3.42 2000 7300 6500 N/A 12,000Wheelbase Gas/FlexFuel (LMF) 334 @ 4500

sAVANA 2500 CARGO

RWDRegular Vortec 4.8L V8 280 @ 5200 3.42 3222 8600 7400 N/A 13,000Wheelbase Gas/FlexFuel (L20) 295 @ 4600

Vortec 6.0L V8 324 @ 4700 3.42 3209 8600 10,000 N/A 16,000 Gas/FlexFuel (L96) 373 @ 4400

Duramax 6.6L Turbo Diesel 260 @ 3100 3.54 2390 8600 10,000 N/A 17,000 V8 B-20 compatible (LGH) 525 @ 1600

RWDExtended Vortec 4.8L V8 280 @ 5200 3.42 3009 8600 7200 N/A 13,000Wheelbase Gas/FlexFuel (L20) 295 @ 4600

Vortec 6.0L V8 324 @ 4700 3.42 2999 8600 10,000 N/A 16,000 Gas/FlexFuel (L96) 373 @ 4400

Duramax 6.6L Turbo Diesel 260 @ 3100 3.54 2171 8600 10,000 N/A 17,000 V8 B-20 compatible (LGH) 525 @ 1600

trailering/hauling sPeCifiCation Chart



sAVANA 3500 CARGORWDRegular Vortec 4.8L V8 280 @ 5200 3.42 4187 9600 7400 N/A 13,000Wheelbase Gas/FlexFuel (L20) 295 @ 4600 Vortec 6.0L V8 324 @ 4700 3.42 4174 9600 10,000 N/A 16,000 Gas/FlexFuel (L96) 373 @ 4400 Duramax 6.6L Turbo Diesel 260 @ 3100 3.54 3343 9600 10,000 N/A 17,000 V8 B-20 compatible (LGH) 525 @ 1600 RWDExtended Vortec 4.8L V8 280 @ 5200 3.42 3992 9600 7100 N/A 13,000Wheelbase Gas/FlexFuel (L20) 295 @ 4600 Vortec 6.0L V8 323 @ 4600 3.42 3981 9600 10,000 N/A 16,000 Gas/FlexFuel (L96) 373 @ 4400 Duramax 6.6L Turbo Diesel 260 @ 3100 3.54 3438 9600 10,000 N/A 18,500 V8 B-20 compatible (LGH) 525 @ 1600

sAVANA 1500 pAsseNGeRRWDRegular Vortec 5.3L V8 310 @ 5200 3.73 1722 7300 6200 N/A 12,000Wheelbase Gas/FlexFuel (LMF) 334 @ 4500 AWDRegular Vortec 5.3L V8 310 @ 5200 3.42 1516 7300 6000 N/A 12,000 Wheelbase Gas/FlexFuel (LMF) 334 @ 4500 Vortec 5.3L V8 310 @ 5200 3.73 1503 7300 6000 N/A 12,000 Gas/FlexFuel (LMF) 334 @ 4500

sAVANA 2500 pAsseNGeRRWDRegular Vortec 4.8L V8 280 @ 5200 3.42 2700 8600 6700 N/A 13,000Wheelbase Gas/FlexFuel (L20) 295 @ 4600 Vortec 6.0L V8 324 @ 4700 3.42 2476 8600 9800 N/A 16,000 Gas/FlexFuel (L96) 373 @ 4400

sAVANA 3500 pAsseNGeRRWDRegular Vortec 6.0L V8 324 @ 4700 3.42 3461 9600 9700 N/A 16,000Wheelbase Gas/FlexFuel (L96) 373 @ 4400 Duramax 6.6L Turbo Diesel 260 @ 3100 3.54 2846 9600 9900 N/A 17,000 V8 B-20 compatible (LGH) 525 @ 1600 RWDExtended Vortec 6.0L V8 324 @ 4700 3.42 3142 9600 9300 N/A 16,000Wheelbase Gas/FlexFuel (L96) 373 @ 4400 Duramax 6.6L Turbo Diesel 260 @ 3100 3.54 2630 9900 9700 N/A 17,000 V8 B-20 compatible (LGH) 525 @ 1600

sIeRRA 15002WDRegularCab Vortec 4.3L V6 (LU3) 195 @ 4600 3.23 1937 6400 4800 N/A 9500standard box 260 @ 2800 Vortec 4.3L V6 (LU3) 195 @ 4600 3.73 1937 6400 5400 N/A 10,000 260 @ 2800 Vortec 4.8L VVT V8 302 @ 5600 3.23 1815 6400 4700 N/A 9500 Gas/FlexFuel (L20) 305 @ 4600 Vortec 4.8L VVT V8 302 @ 5600 3.73 1815 6400 7200 N/A 12,000 Gas/FlexFuel (L20) 305 @ 4600 Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.08 1768 6400 6600 N/A 11,500 Gas/FlexFuel (LMG) 335 @ 4000 Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.08 1768 6400 74001 N/A 12,2001 Gas/FlexFuel (LMG) 335 @ 4000 Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.42 1768 6400 91001 N/A 14,0001 Gas/FlexFuel (LMG) 335 @ 4000 2WDRegularCab Vortec 4.3L V6 (LU3) 195 @ 4600 3.23 1806 6400 4700 N/A 9500long box 260 @ 2800 Vortec 4.3L V6 (LU3) 195 @ 4600 3.73 1806 6400 52001 N/A 10,0001 260 @ 2800 Vortec 4.8L VVT V8 302 @ 5600 3.23 1684 6400 5100 5100 10,000 Gas/FlexFuel (L20) 305 @ 4600 Vortec 4.8L VVT V8 302 @ 5600 3.73 1684 6400 7100 N/A 12,000 Gas/FlexFuel (L20) 305 @ 4600 Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.08 1649 6400 6500 6000 11,500 Gas/FlexFuel (LMG) 335 @ 4000 Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.08 1649 6400 72001 72001 12,2001 Gas/FlexFuel (LMG) 335 @ 4000 Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.42 1649 6400 10,0001 89001 15,0001 Gas/FlexFuel (LMG) 335 @ 4000

1 Requires (K5L) Heavy duty cooling package.




1 Requires (K5L) Heavy duty cooling package.2 Requires Max Trailering Package.

trailer Weight rating (tWr) horsePoWer @ rPM axle Max. ball 5th Wheel engine torque (lb.-ft.) @ rPM ratio Payload gvWr hitCh hitCh gCWr

sIeRRA 1500 (CONtINueD)

2WDExtendedCab Vortec 4.3L V6 (LU3) 195 @ 4600 3.23 1494 6400 4400 N/A 9500standard box 260 @ 2800

Vortec 4.8L VVT V8 302 @ 5600 3.23 1759 6800 4700 N/A 10,000 Gas/FlexFuel (L20) 305 @ 4600


Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.08 1732 6800 6200 N/A 11,500 Gas/FlexFuel (LMG) 335 @ 4000


Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.42 1732 6800 97001 9200 15,0001 Gas/FlexFuel (LMG) 335 @ 4000

Vortec 6.2L VVT V8 403 @ 5700 3.42 1725 6800 9700 9300 15,000 Gas/FlexFuel (L9H) 417 @ 4300

Vortec 6.2L VVT V8 403 @ 5700 3.73 19252 7000 10,7002 10,200 16,0002 Gas/FlexFuel (L9H) 417 @ 4300

2WDExtendedCab Vortec 5.3L VVT V8 315 @ 5200 3.08 1656 6900 6000 N/A 11,500long box w/ AFM Gas/FlexFuel (LMG) 335 @ 4000

Vortec 5.3L VVT V8 315 @ 5200 3.08 1656 6900 67001 N/A 12,2001 w/ AFM Gas/FlexFuel (LMG) 335 @ 4000

Vortec 5.3L VVT V8 w/ AFM 315 @ 5200 3.42 1656 6900 95001 8900 15,0001 Gas/FlexFuel (LMG) 335 @ 4000

2WDCrewCab Vortec 4.8L VVT V8 302 @ 5600 3.23 1705 6800 4700 N/A 10,000 Gas/FlexFuel (L20) 305 @ 4600





Vortec 6.2L VVT V8 403 @ 5700 3.42 16801 6800 97001 N/A 15,0001 Gas/FlexFuel (L9H) 417 @ 4300

Vortec 6.2L VVT V8 403 @ 5700 3.73 19802 7100 10,6002 N/A 16,0002 Gas/FlexFuel (L9H) 417 @ 4300

4WDRegularCab 4.3L V6 (LU3) 195 @ 4600 3.73 1693 6400 5100 N/A 10,000standard box 260 @ 2800


Vortec 5.3L VVT V8 315 @ 5200 3.08 1523 6400 6400 N/A 11,500 Gas/FlexFuel (LMG) 335 @ 4000

Vortec 5.3L VVT V8 315 @ 5200 3.08 1523 6400 71001 7100 12,2001 Gas/FlexFuel (LMG) 335 @ 4000


4WDRegularCab 4.3L V6 (LU3) 195 @ 4600 3.73 1545 6400 4900 N/A 10,000long box 260 @ 2800


Vortec 5.3L VVT V8 315 @ 5200 3.08 1779 6800 6300 N/A 11,500 Gas/FlexFuel (LMG) 335 @ 4000







sIeRRA 1500 (CONtINueD)

4WDExtendedCab Vortec 4.8L VVT V8 302 @ 5600 3.42 1733 7000 5500 N/A 11,000standard box Gas/FlexFuel (L20) 305 @ 4600

Vortec 5.3L VVT V8 315 @ 5200 3.08 1788 7000 6100 N/A 11,500 Gas/FlexFuel (LC9) 335 @ 4000


Vortec 5.3L VVT V8 315 @ 5200 3.42 1788 7000 96001 96001 15,0001 Gas/FlexFuel (LC9) 335 @ 4000

Vortec 6.2L VVT V8 403 @ 5700 3.42 16791 7000 94001 9100 15,0001 Gas/FlexFuel (L9H) 417 @ 4300

Vortec 6.2L VVT V8 403 @ 5700 3.73 18792 7200 10,4002 10,300 16,0002 Gas/FlexFuel (L9H) 417 @ 4300

4WDExtendedCab Vortec 5.3L VVT 315 @ 5200 3.08 1512 7000 5800 N/A 11,500long box V8 Gas/FlexFuel (LMG) 335 @ 4000

Vortec 5.3L VVT 315 @ 5200 3.08 1512 7000 65001 N/A 12,2001 V8 Gas/FlexFuel (LMG) 335 @ 4000


4WDCrewCab Vortec 4.8L VVT V8 302 @ 5600 3.42 1671 7000 5500 N/A 11,000 Gas/FlexFuel (L20) 305 @ 4600




Vortec 6.2L VVT V8 403 @ 5700 3.42 1628 7000 94001 N/A 15,0001 Gas/FlexFuel (L9H) 417 @ 4300

Vortec 6.2L VVT V8 403 @ 5700 3.73 1928 7300 10,4002 N/A 16,0002 Gas/FlexFuel (L9H) 417 @ 4300

sIeRRA 1500 HYbRID

2WDCrewCab Vortec 6.0L VVT 332 @ 5100 3.08 1553 7100 6100 N/A 12,000short box V8 w/ AFM 367 @ 4100

4WDCrewCab Vortec 6.0L VVT 332 @ 5100 3.08 1519 7300 5900 N/A 12,000short box V8 w/ AFM 367 @ 4100

sIeRRA 2500 (INCOmplete mODels exCluDeD)

2WDRegularCab Vortec 6.0L VVT 360 @ 5400 3.73 3704 9300 10,200 10,200 16,000long box V8 Gas (L96) 380 @ 4200

Vortec 6.0L VVT 360 @ 5400 3.73 4192 10,000 13,000 14,700 20,500 V8 Gas (L96) 380 @ 4200

Vortec 6.0L VVT 360 @ 5400 4.10 4192 9300 13,000 14,700 20,500 V8 Gas (L96) 380 @ 4200

Duramax 6.6L Turbo Diesel 397 @ 3000 3.73 3425 9900 13,000 17,800 24,500 V8 B-20 compatible (LML) 765 @ 1600

2WDExtendedCab Vortec 6.0L VVT 360 @ 5400 3.73 3506 9500 9800 9800 16,000standard box V8 Gas (L96) 380 @ 4200

Vortec 6.0L VVT V8 Gas (L96) 360 @ 5400 4.10 3506 9500 13,000 14,300 20,500 380 @ 4200

Duramax 6.6L Turbo Diesel 397 @ 3000 3.73 3205 10,000 13,000 17,500 24,500 V8 B-20 compatible (LML) 765 @ 1600

2WDExtendedCab Vortec 6.0L VVT 360 @ 5400 3.73 3404 9500 9700 9700 16,000long box V8 Gas (L96) 380 @ 4200




1 Requires (K5L) Heavy duty cooling package.2 Requires Max Trailering Package.



1 Requires (MYC) 6-speed automatic transmission. Not available with (K5L) Heavy duty cooling package.2 Requires (MYC) 6-speed automatic transmission and (K5L) Heavy duty cooling package or (M30) 4-speed automatic transmission.3 Not available with (K5L) Heavy duty cooling package.4 Requires (K5L) Heavy duty cooling package.5 Requires Max Trailering Package.


sIeRRA 2500 (INCOmplete mODels exCluDeD) (C0NtINueD)

2WDCrewCab Vortec 6.0L VVT V8 Gas (L96) 360 @ 5400 3.73 3385 9500 9700 9700 16,000standard box 380 @ 4200



2WDCrewCab Vortec 6.0L VVT V8 Gas (L96) 360 @ 5400 3.73 3292 9500 9600 9600 16,000long box 380 @ 4200



4WDRegularCab Vortec 6.0L VVT V8 Gas (L96) 360 @ 5400 3.73 3580 9500 9900 9900 16,000long box 380 @ 4200


Duramax 6.6L Turbo Diesel V8 397 @ 3000 3.73 3126 9900 13,000 17,500 24,500 B-20 compatible (LML) 765 @ 1600

4WDExtendedCab Vortec 6.0L VVT 360 @ 5400 3.73 3222 9500 9500 9500 16,000standard box V8 Gas (L96) 380 @ 4200


Duramax 6.6L Turbo Diesel V8 397 @ 3000 3.73 2895 10,000 13,000 17,200 24,500 B-20 compatible (LML) 765 @ 1600

4WDExtendedCab Vortec 6.0L VVT 360 @ 5400 3.73 3130 9500 9400 9400 16,000long box V8 Gas (L96) 380 @ 4200






4WDCrewCab Vortec 6.0L VVT V8 Gas (L96) 322 @ 4400 3.73 3375 9900 9300 9300 16,000long box 380 @ 4200





sIeRRA 3500 (INCOmplete mODels exCluDeD)

2WDRegularCab Vortec 6.0L VVT V8 Gas (L96) 322 @ 4400 3.73 6635 12,800 9600 9600 16,000long box 380 @ 4200 (DRW) (DRW) (DRW) (DRW) (DRW)

Vortec 6.0L VVT V8 Gas (L96) 322 @ 4400 4.10 4632; 10,400; 13,000; 14,500; 20,500; 380 @ 4200 6635 12,800 14,100 14,100 20,500 (DRW) (DRW) (DRW) (DRW) (DRW)

2WDExtendedCab Vortec 6.0L 322 @ 4400 3.73 4397; 10,700; 9500; 9500; 16,000;long box VVT V8 Gas (L96) 380 @ 4200 6332 13,000 9100 9100 16,000 (DRW) (DRW) (DRW) (DRW) (DRW)


Duramax 6.6L Turbo Diesel 397 @ 3000 3.73 4209; 11,200; 13,000; 17,300; 24,500; V8 B-20 compatible (LML) 765 @ 1600 5540 13,000 16,500 21,500 29,200 (DRW) (DRW) (DRW) (DRW) (DRW)

2WDCrewCab Vortec 6.0L VVT V8 Gas (L96) 322 @ 4400 3.73 4200 10,500 9500 9500 16,000standard box 380 @ 4200

Vortec 6.0L VVT V8 Gas (L96) 322 @ 4400 4.10 4200 10,500 13,000 14,000 20,500 380 @ 4200


2WDCrewCab Vortec 6.0L VVT V8 Gas (L96) 322 @ 4400 3.73 4286; 10,700; 9400; 9400; 16,000;long box 380 @ 4200 6223 13,000 9000 9000 16,000 (DRW) (DRW) (DRW) (DRW) (DRW)


Duramax 6.6L Turbo Diesel V8 397 @ 3000 3.73 4416; 11,400; 13,000; 17,300; 24,500; B-20 compatible (LML) 765 @ 1600 5456 13,000 16,500 21,500 29,200 (DRW) (DRW) (DRW) (DRW) (DRW)

4WDRegularCab Vortec 6.0L VVT V8 Gas (L96) 322 @ 4400 3.73 4566; 10,700; 9700; 9700; 16,000;long box 380 @ 4200 6308 12,800 9300 9300 16,000 (DRW) (DRW) (DRW) (DRW) (DRW)



4WDExtendedCab Vortec 6.0L VVT 322 @ 4400 3.73 4420; 11,000; 9200; 9200; 16,000;long box V8 Gas (L96) 380 @ 4200 6055 13,000 8900 8900 16,000 (DRW) (DRW) (DRW) (DRW) (DRW)



4WDCrewCab Vortec 6.0L VVT 322 @ 4400 3.73 4227 10,800 9200 9200 16,000standard box V8 Gas (L96) 380 @ 4200



4WDCrewCab Vortec 6.0L VVT 322 @ 4400 3.73 4268; 11,000; 9100; 9100; 16,000;long box V8 Gas (L96) 380 @ 4200 5905 13,000 8700 8700 16,000 (DRW) (DRW) (DRW) (DRW) (DRW)






sIeRRA DeNAlI 1500

2WDCrewCab Vortec 6.2L V8 403 @ 5700 3.42 1615 6800 9600 N/A 15,000short box Gas/FlexFuel (L9H) 417 @ 4300

AWDCrewCab Vortec 6.2L V8 403 @ 5700 3.42 1622 7000 9400 N/A 15,000short box Gas/FlexFuel (L9H) 417 @ 4300

sIeRRA DeNAlI 2500

2WDCrewCab Vortec 6.0L VVT 360 @ 5400 3.73 3200 9500 9500 9500 16,000standard box V8 Gas (L96) 380 @ 4200






sIeRRA DeNAlI 3500







2WDCrew Vortec 6.0L VVT V8 Gas (L96) 360 @ 5400 3.73 6051 13,000 9200 9200 16,000long box (drW) 380 @ 4200



4WDCrew Vortec 6.0L VVT V8 Gas (L96) 360 @ 5400 3.73 5733 13,000 8500 8500 16,000long box (drW) 380 @ 4200






teRRAIN

2WD 2.4L DOHC SIDI VVT I4 Gas (LAF) 182 @ 6700 3.23 1162 (base) 4960 1500 N/A 5787 172 @ 4900

3.0L DOHC SIDI VVT V6 264 @ 6950 2.77 1162 (base) 5200 3500 N/A 7937 Gas/FlexFuel (LFW) 222 @ 5100

AWD 2.4L DOHC SIDI VVT I4 Gas (LAF) 182 @ 6700 3.53 1162 (base) 5070 1500 N/A 5952 172 @ 4900

3.0L DOHC SIDI VVT V6 264 @ 6950 2.77 1162 (base) 5300 3500 N/A 8157 Gas/FlexFuel (LFW) 222 @ 5100

YuKON

2WD Vortec 5.3L V8 Gas/FlexFuel (LMG) 320 @ 5400 3.08 1673 7100 5500 N/A 11,000 335 @ 4000

Vortec 5.3L V8 Gas/FlexFuel (LMG) 320 @ 5400 3.42 1673 7100 6000 N/A 11,500 335 @ 4000


4WD Vortec 5.3L V8 Gas/FlexFuel (LMG) 320 @ 5400 3.08 1616 7300 5200 N/A 11,000 335 @ 4000



YuKON xl

2WD,1/2-TON Vortec 5.3L V8 Gas/FlexFuel (LMG) 320 @ 5400 3.08 1538 7200 5100 N/A 11,000 335 @ 4000



2WD,3/4-TON Vortec 6.0L VVT V8 Gas (L96) 352 @ 5400 3.73 2454 8600 9600 N/A 16,000 382 @ 4200

4WD,1/2-TON Vortec 5.3L V8 Gas/FlexFuel (LC9) 320 @ 5400 3.08 1587 7400 5000 N/A 11,000 335 @ 4000

Vortec 5.3L V8 Gas/FlexFuel (LC9) 320 @ 5400 3.42 1587 7400 5500 N/A 11,500 335 @ 4000

Vortec 5.3L V8 Gas/FlexFuel (LC9) 320 @ 5400 3.42 1587 7400 8000 N/A 14,000 335 @ 4000

4WD,3/4-TON Vortec 6.0L VVT V8 (L96) 352 @ 5400 3.73 2187 8600 9400 N/A 16,000 382 @ 4200

YuKON DeNAlI

2WD Vortec 6.2L VVT V8 w/ AFM 403 @ 5700 3.42 1620 7100 8300 N/A 14,000 Gas/FlexFuel (L94) 417 @ 4300

AWD Vortec 6.2L VVT V8 w/ AFM 403 @ 5700 3.42 1622 7300 8100 N/A 14,000 Gas/FlexFuel (L94) 417 @ 4300

YuKON xl DeNAlI

2WD Vortec 6.2L VVT V8 w/ AFM 403 @ 5700 3.42 1461 7200 7900 N/A 14,000 Gas/FlexFuel (L94) 417 @ 4300

AWD Vortec 6.2L VVT V8 w/ AFM 403 @ 5700 3.42 1477 7400 7800 N/A 14,000 Gas/FlexFuel (L94) 417 @ 4300

1 Requires (K5L) Heavy duty cooling package.


ConneCting for safety on the road

tyPes and ClassifiCations of trailer hitChes and trailersThere are three main types of trailer hitches. Choosing the right hitch depends on the tow vehicle and trailer type and size, and can affect how the combination accelerates, handles and brakes.

hitCh tyPes

Weight Carrying hitch – This type of hitch supports the trailer’s tongue weight without any means of distribution. It consists of a hitch ball mounted to a step bumper or draw bar and is commonly used for trailering light and medium loads. Hitch balls are available in a range of sizes. When selecting a weight carrying hitch, be sure the diameter of the ball matches the trailer coupler and that the ball meets or exceeds the loaded trailer weight.

Weight distributing hitch – Used for heavier trailering, a weight distributing hitch applies leverage between the tow vehicle and the trailer using spring bars to shift some of the hitch weight forward onto the tow vehicle’s front axle and rearward to the trailer’s axles.

fifth Wheel and gooseneck hitches – These hitches are designed for heavy duty trailering with full-size pickups. The hitch is located in the bed of the truck and positions the trailer’s kingpin weight over or slightly in front of the truck’s rear axle. This mounting location reduces trailer sway and helps make long trailers more maneuverable.

gooseneCk hitCh

fifth Wheel hitCh

Weight distributing hitCh

Weight Carrying hitCh


ConneCting for safety on the road

trailer ClassifiCation

Many customers refer to trailer or hitch class when selecting a tow vehicle. There is nothing wrong with that, but it is important to note that trailer classes were originally established to match hitch ball-to-trailer coupler size.

tyPiCal tyPiCal hitChClassifiCation exaMPles Weight range hitCh tyPe (tongue) Weight

i Small popup camping Up to 2000-lb. Weight carrying 10–15% of gross trailer trailers and one/two position gross weight weight; 200-lb. maximum snowmobile or personal watercraft trailers

II Single-axle trailers such as 2001–3500-lb. gross Weight carrying 10–15% of gross trailer open utility trailers, three/four trailer weight weight; 350-lb. maximum position snowmobile/ATV trailers and small speedboats

III Dual- or single-axle trailers 3501–5000-lb. gross Weight carrying or 10–15% of gross trailer such as larger boats and trailer weight weight distributing weight; 600-lb. maximum enclosed utility trailers

IV Horse, travel and auto 5001–10,000-lb. gross Weight distributing 10–15% of gross transport trailers trailer weight trailer weight; 1200-lb. maximum

V* Largest horse, travel and 10,000-lb. and above Weight distributing, 10–15% of gross trailer fifth wheel recreational gross trailer weight fifth wheel weight (1500-lb. maximum or commercial trailers or gooseneck for weight distributing hitch); 15–25% of gross trailer weight (3500 lbs. maximum for fifth wheel or gooseneck hitch)

* Technically there is no Class V, but some aftermarket hitch equipment companies use the term for ratings above 10,000 lbs.

Class Considerations

1. Classes are weight ranges.

2. The class of a hitch system will be determined by the rating of the weakest component in the system. For example, if the original equipment trailer hitch platform is rated to 10,000 lbs., and a 5000-lb. drawbar is inserted and a 1-7/8" hitch ball (limited to 2000 lbs.) is attached, the system is Class I.

3. The class of the original equipment trailer hitch platform is not really important. The actual rating of the trailer hitch platform is what counts. A 6000-lb. rated trailer hitch platform and a 10,000-lb. rated trailer hitch platform are each Class IV, but they are not the same. The actual rating value tells the customer far more than the class. The trailer hitch ratings can be found on the trailer hitch platform rating label.


trailering teChnologies

tow/haul Mode – The feature gives automatic transmissions on selected models a dual-mode shift program. When Tow/Haul mode is activated, transmission upshift points are raised to use more of the engine’s power for strong acceleration. Downshift points are also raised to help slow the vehicle using engine braking. Tow/Haul mode is designed to be most effective when the vehicle and trailer combination weight is at least 75 percent of the vehicle’s Gross Combination Weight Rating (GCWR).

trailer brakes – Loaded trailers weighing over 2000 lbs. require trailer brakes on Sierra and Yukon models; and loaded trailers weighing more than 1000 lbs. require trailer brakes on other GMC models. There are two common types of trailer brakes: surge brakes and electric brakes. Surge brakes are most commonly found on boat trailers. They are a self-contained hydraulic brake system on the trailer activated during deceleration as the trailer coupler pushes on the hitch ball. Electric brakes are most commonly found on travel trailers, horse trailers and car haulers. An electric trailer brake system uses a brake control unit mounted inside the tow vehicle. It operates by sensing tow vehicle brake application and activating the trailer brakes.

integrated trailer brake Controller – GMC offers an optional integrated trailer brake controller for trailers equipped with electric trailer brakes. Power output to the trailer brakes is based on the amount of brake pressure being applied to the tow vehicle brakes. The power output can also be adjusted to a wide range of trailering situations.

The integrated trailer brake controller is integrated with the vehicle’s brake, ABS and StabiliTrak systems. In situations that cause the vehicle’s ABS or StabiliTrak systems to activate, power sent to the trailer brakes will be automatically adjusted to minimize trailer wheel lockup.

Mirrors – GMC vehicles are available with factory- or dealer-installed trailer towing mirrors. These mirrors extend farther out than the standard mirrors to give the driver the ability to see around the trailer for an improved rearward view.

rearview Camera system – Consists of a rear-mounted camera and an interior monitor. This system takes the guesswork out of lining up the trailer hitch ball with the trailer coupler.

locking differential – This device is designed to improve low-speed traction of your vehicle. The differential engages when the speed difference between the rear tires reaches approximately 100 rpm or approximately a 10 mile-per-hour differential. Once the differential engages, both rear tires rotate at the same speed, providing equal amount of the driveline’s torque to both rear wheels for enhanced traction.

electrical system – Trailers are equipped with exterior lighting systems that include stop and turn signals and running lamps. Many trailers are also equipped with electric trailer brakes. These electrical components can be demanding on your vehicle’s electrical system. However, all GMC vehicles are available with upgraded batteries, alternators and even heavy duty flashers to handle the increased electrical load when towing a trailer.

trailer sway Control system – Provides an added measure of confidence when towing a trailer. The system senses conditions of trailer sway and intervenes with braking and/or reduced engine power to bring the trailer under control and keep it on its intended path. The system uses electric trailer brakes when a trailer is plugged into the standard wiring harness of the truck, and its performance requires no input from the driver.

exhaust brake – Included on Duramax-equipped models is the “smart” exhaust brake. This driver-selectable feature uses the turbine control of the variable geometry turbocharger and the compression of the engine to generate backpressure, slowing the vehicle without applying the brakes. It is integrated with the cruise control feature, and varies the braking to account for the grade and vehicle load. The exhaust brake allows for virtually effortless driving and towing, with seamless and quiet operation. It also helps prolong brake life and prevents overheating the brakes on long, downhill grades.

hill start assist – The hill start assist system is automatically engaged when sensors detect the vehicle is on a grade of about 5 percent or greater. It holds the brakes for about 1.5 seconds or until the gas pedal is pressed, preventing rollback. It is particularly effective when towing, giving the driver time to switch from the brake pedal to the gas pedal without rolling.

strong hitch assemblies – On the GMC HD models, engineers addressed common customer and aftermarket uses when designing the frames, including adding access holes to the rear frame section to enable easier installation of fifth-wheel/gooseneck-style hitches. Also, the frame-mounted hitch for conventional trailering is a very strong box-tube design.

Several GMC vehicles are available with factory- and/or dealer-installed equipment to help make hauling and trailer towing as safe and efficient as possible. Below are several key features designed to enhance the overall trailering and hauling experiences.


tiresBe sure the tow vehicle tires are inflated to the pressures found on the Tire Pressure or Vehicle Certification Labels found on the driver’s side door or B-pillar. The trailer tires should also be inflated to the pressure indicated on the trailer Certification Label. Also, be sure that the Gross Vehicle Weight and the Gross Axle Weight Rating figures are not exceeded in either vehicle.

safety ChainsSafety chains should always be attached between the tow vehicle and trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes separated from the hitch. Leave enough slack to allow the vehicle to make turns, but be sure the chains do not drag on the ground.

Pre-insPeCtion

Before setting out on a trip, check all trailer hitch parts and attachments, safety chains, electrical connections, lamps, tires and mirror adjustments. If the trailer is equipped with trailer brakes, get the vehicle and trailer slowly rolling and apply the trailer brake controller to ensure the brakes are working.

During the trip, stop occasionally to make sure the load is secure and the lamps and trailer brakes are still working.

knoW the rig

Before setting out on the open road, be sure to be acquainted with the feel of handling and braking with the added weight. Also, remember that the combination vehicle is now a good deal longer and is not nearly as responsive as the tow vehicle by itself.

reCreational toWing

Recreational towing is the term used when towing the vehicle behind another vehicle, such as behind a motorhome. There are two types:

• dinghy or flat towing – Towing the vehicle with all four wheels on the ground.

• dolly towing – Towing the vehicle with two wheels on the ground and two wheels on a device called a dolly.

Regardless of the trailering method used, be sure that the vehicle being towed does not exceed the trailering limits of the tow vehicle and that the driveline is capable.

See the chart to determine which GMC vehicles can be dinghy or flat towed.

dinghy (flat) toWing CaPability

aca

dia

Cany

on

terr

ain

sava

na

sier

ra

yuko

n

yuko

n x

l

yuko

n d

enal

i/

xl

den

ali

2WD Yes No Yes No No No No No

4WD – Yes – – Yes Yes Yes –

AWD Yes – Yes No No – – No

on the roadaccelerating/braking – Avoid overworking the vehicle’s engine when trailering by applying gradual pressure on the accelerator. Allow your vehicle to safely reach a comfortable driving speed. Give yourself extra time and room when merging onto highways. Braking when pulling a trailer requires extra distance; allow ample room to come to a safe stop. A good measure of determining a safe following distance is to allow one vehicle and one trailer length between you and the vehicle ahead for every 10 mph of speed. When braking, use firm, steady pressure on the brake pedal.

Controlling trailer sway – Sway refers to the instability of the trailer relative to the trailer vehicle. Trailer sway often results from improper weight distribution, excessive speed or overloading. Other factors that can cause trailer sway include crosswinds, poor vehicle maintenance and road conditions. Trying to steer out of sway will likely make it worse. Speed is a major contributor to trailer sway, so you need to slow the vehicle. Braking, however, can lead to a jackknife or other loss of control. To control sway:

• Hold the steering wheel as steady as possible.

• Release the accelerator, but to not touch the brake pedal.

• Activate the electric trailer brakes (if equipped) by hand, until the sway condition stops.

• Use the vehicle brakes to come to a complete stop.

You should then pull your vehicle to the side of the road and attempt to determine the cause of the instability. Check the cargo load for shifting and improper weight distribution. Check the tire pressure on the tow vehicle and trailer and the condition of the suspension and shocks. If the sway was caused by strong winds, wait for conditions to improve before continuing your trip. Remember, GMC HD trucks are available with a Trailer Sway Control System. In addition, some trailers can be equipped with anti-sway devices.

trailering tiPs and additional inforMation


trailering tiPs and additional inforMation

Cornering – The turning radius of a trailer is typically much smaller than that of your vehicle. When approaching a sharp corner, brake sooner than normal to reduce speed before entering the turn. Drive the vehicle slightly past the normal turning point and then firmly turn the steering wheel. By cornering at a wider angle, both vehicle and trailer should safely clear the inside of the turn.

Passing – When passing, allow additional time and distance to safely pass the other vehicle. Signal your intention to pass well in advance, and when re-entering the lane, make certain your trailer is clear of the vehicle you passed. Never pass on hills or around curves.

backing up – To back up a trailer, place a hand at the 6 o’clock position on the steering wheel. To move the trailer to the left, move your hand to the left. To move the trailer to the right, move your hand to the right. Back up slowly and move the steering wheel in small increments to help maintain control. To assist in backing up, it is helpful to have someone outside the vehicle to guide you. Make certain you can see the spotter at all times.

driving on grades – Before going down a steep incline, reduce your speed and shift the transmission into a lower gear. This provides engine braking and reduces the need to brake for long periods. When driving up a steep grade, shift to a lower gear for more torque to maintain speed and avoid lugging the engine. Crest the hill no faster than the speed at which you want to descend and in the gear you expect will require little braking. Pay attention to your temperature gauges for any signs of overheating.

overheating – Prolonged driving with overheated fluids can cause damage to the vehicle. If temperature gauges register abnormally high, if there is a marked decrease in power of if you hear unusual engine noises, immediately take the following steps:

• Pull the vehicle to the side of the road. Once stopped, shift into Park (automatic transmissions) or Neutral (manual transmissions) and apply the parking brakes. Leave the engine running.

• Turn off the air conditioning and other accessories to reduce load on the engine. Roll down the windows and turn the heater on to maximum and the fan to its highest setting. The heater core provides a second cooling surface that can help reduce engine temperatures.

• If you suspect the overheating is the result of climbing a long, steep grade, run the engine at fast idle (1500 rpm) until the temperature gauge registers a normal reading.

• With the vehicle in Park or Neutral and the parking brake engaged, be mindful of traffic and exit the vehicle and look for steam or leaking coolant underneath the engine. If you see either of these, shut off the engine and allow it to cool. To avoid being burned, do not attempt to remove the radiator cap until the engine has cooled.

Parking on grades – Parking on steep grades with a trailer is not recommended; however if the situation cannot be avoided, be sure to follow this procedure:

• Apply the brakes and shift into Neutral.

• Have someone block the trailer’s wheels on the downgrade side.

• Release the brakes until the blocks absorb the load.

• Apply the parking brake and shift into Park.

leaving your Parking spot on grades – Follow these steps when you are ready to depart from your parking spot on a grade.

• Hold the brake pedal down and start the engine.

• Shift into gear and release the parking brake.

• Release the brake and drive uphill slightly until free from the blocks.

• Apply brakes and have someone retrieve the blocks.

Documents

2011 trailering guide › teams › repository › ...Yukon XL 9600 Yukon 8500 Sierra 2500HD 17,800 13,000 Sierra 1500 10,600 10,700 Yukon XL Denali 7900 Yukon Denali 8300 Acadia 5200