The new eAssist™ system available on the 2012 LaCrosseand Regal offers impressive 25% fuel economy gainsover the 2011 models without eAssist.

The eAssist system uses a state-of-the-artlithium-ion battery system, electric inductionmotor-generator and regenerative brakingcapability.

eAssist models feature:

• A 2.4L Ecotec 4-cylinder engine mated to aHydra-Matic 6T40 automatic transmission

• Lightweight 17-inch alloy wheels andtires with lower rolling resistance

• A driver-selectable, fuel economy-optimiz-ing eco mode for the air conditioning system, which enables more frequent andlonger-duration engine Auto Stop periods

• An ECO gauge on the instrument panel that continu-ously responds to driving behavior, enabling the driver to drive withgreater efficiency

• A Power Flow display on the Driver Information Center or the optional navigationinfotainment screen, which shows the flow of energy through the electric assist sys-tem, such as battery charging from regeneration and electric power directed to the engine.

July 2011Volume 13, No.7

New Fuel-Saving eAssist System for 2012 . .1MDI Connections . . . . . . . . . . . . . . . . . . . . . .1Camaro Convertible Roof Cloth Appearance . . . . . . . . . . . . . . . . . . . . . . . . . .3Programming the ASTRA . . . . . . . . . . . . . . . .4Volt Cooling System Service . . . . . . . . . . . . .5Power Seatback Recliner . . . . . . . . . . . . . . . .5Rear Park Assist Connector . . . . . . . . . . . . . .5VIN Cards Available on GM GlobalConnect .6Corvette Convertible Windscreen Installation . . . . . . . . . . . . . . . . . . . . . . . . . . .6Truck Accessory Soft Tonneau Cover . . . . . .6New Labor Operation for Battery Replacements under Roadside Service . . . . .7Power Liftgate Inoperative with Key Off . . . .7HVAC Temperature and Air Delivery Response . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Service Know-How . . . . . . . . . . . . . . . . . . . . .7Car Issues – Fix It Right the First Time . . . . .8Truck Issues – Fix It Right the First Time . . . .9

Customer Care and Aftersales

ContentsTECHLINEnews

continued on page 2

continued on page 3

When using the Multiple DiagnosticInterface (MDI) tool with a wirelessnetwork connection, some users mayhave experienced an intermittent network connection. One possiblecause for the intermittent connectionmay be that the wireless card has become unseated from its port.

To help improve the connection, remove the rubber end cover from theMDI and push the wireless card to reseat it. It may be helpful to install afoam spacer to keep pressure on thecard.

To install a spacer, cut a piece of 1/4-inch self-adhesive foamand place it on the inside of the rubber boot over the end of thewireless card.

Place the foam spacer on the inside of the rubber boot.

MDI Connections

New Fuel-Saving eAssist System for 2012

Electric Boost

The eAssist system uses power stored inthe advanced 115V lithium-ion battery toprovide an electrical boost in various driving scenarios. The high-voltage batteryand latest-generation 15-kW inductionmotor-generator unit help increase fueleconomy through:

• Regenerative braking, which provides upto 15 kW of electricity to charge the battery

• Electric power assistance, up to 11 kW(15 hp), during heavy acceleration andwhen climbing grades

• Automatic engine shut-off (Auto Stop)when the vehicle is stopped

• Aggressive fuel cut-off during decel -eration down to zero vehicle speed, en-abled by the torque smoothing providedby the induction motor-generator unit

• Intelligent charge/discharge of the high-voltage battery.

The high-voltage battery system is designed to provide power assistance tothe internal combustion engine, ratherthan store energy for all-electric propul-sion. While in fuel shut-off mode, the induction motor-generator unit continuesspinning along with the engine to provideregenerative braking, torque smoothingand immediate take-off power when thedriver presses on the accelerator. Then, asthe vehicle comes to a stop, the inductionmotor-generator unit spins the engine,bringing it to a smooth stop – properly positioned for an immediate restart whenthe driver releases the brake pedal or applies the accelerator pedal.

TIP: The regenerative braking process requires unique transmission shifting asthe vehicle slows down.

Auto Stop

While driving, when the brake is appliedand the vehicle comes to a complete stop,the engine may turn off. This is referred toas an Auto Stop (the tachometer gaugewill read AUTO STOP). The enginerestarts immediately when the brake pedalis released or the accelerator pedal is applied.

There are several conditions that maycause the engine to remain running orrestart when the vehicle is stopped. Theseinclude:

• The engine, transmission or high-voltagebattery has not reached operating temperature

• The outside temperature is less the –4°F(–20°C)

• The shift lever is in any gear other thanDrive (D)

• The high-voltage battery state-of-charge is low

• The climate control system requires theengine to run based on the climate control or defog setting. Using the ecoair conditioning mode will result in morefrequent and longer Auto Stops

• The Auto Stop time is greater than twominutes

• The Malfunction Indicator Lamp (MIL) isilluminated

When on a moderate or steep grade, thehill-assist system captures brake pressureto help the driver more comfortably accelerate from a stop, which reduces thetendency of the vehicle to roll backwardwith the engine in shut-down mode.

eAssist Components

The liquid-cooled electric induction motor-generator is mounted to the engine in

place of the 12-volt generator to provideboth motor assist and electric-generatingfunctions through a unique engine belt-drive system. The motor-generator is connected to the crankshaft pulley using aspecially designed serpentine belt anddrive belt tensioner

The eAssist generator control and batterymodule assembly contains the high-volt-age lithium-ion battery pack, the inte-grated power inverter and 14V powermodule. It is located in the forward area ofthe trunk compartment and weighs about65 pounds (29 kg). An electric fan coolsthe generator control and battery module,drawing air from a vent located in thepackage tray, behind the rear seat.

Vehicles with eAssist technology also feature improved underbody aerodynamicsand tires optimized for performance andfuel economy.

The Hydra-Matic 6T40 transmission is designed to enhance powertrain efficiency.Significant internal transmission changesto clutch controls and hardware provide reduced spin losses while improving shiftresponse and time.

An auxiliary, electric-driven transmissionoil pump has been added to keep thetransmission fluid flowing and clutches applied when the engine shuts down during an Auto Stop.

The added electric power provided bythe eAssist system also allows for highertransmission gearing, improving steadystate efficiency without impacting acceler-ation performance or driveability. The system’s ability to provide electric assistat cruising speeds allows the driver to accelerate lightly or ascend mild gradeswithout the transmission downshifting.

Thanks to Steve Bunce, Paul Ghanam,Mike Pontello and Irina Novikova

2 July 2011

New Fuel-Saving eAssist System for 2012 –continued from page 1

The LaCrosse instrument cluster features an ECO gauge and Power Flow display.

The generator control and battery moduleincludes the 115V lithium-ion battery packand a power inverter with microprocessor

July 2011 3

TECHLINEnewscontinued from page 1

An intermittent connection also may result from stress onthe USB cable. A high number of MDI tools are sent to therepair center for USB failures. On these tools, many usershave not installed the stress relief adapter on the end of theMDI. The adapter prevents any movement of the USB cablefrom pulling on the connection.

If the adapter is missing, a new one can be ordered from GM Dealer Equipment at www.gmdesolutions.com or 1-800-GMTOOLS. The adapter part number is 3000215.

Install the stress relief adapter with the supplied hardware.Once installed, slide the USB cable through the adapter.

Thanks to Matt Singer

MDI Connections

On some 2011 Camaro Convertibles, theremay be concerns regarding the appearanceof the cloth top.

Loose Cloth Fit

A gap between the #5 bow and the rear"tulip" panel when the top is closed andlatched may cause a sag in the cloth topmaterial, causing the appearance of aloose fit.

This condition may have been caused bythe topics discussed in #PI0378 (Top Op-eration in Cold Weather) and/or #PI0406(Inspection of Water Management Bag).

Replace the #5 bow following the repairprocedures in the Service Information.

For additional information, refer to the GMTraining videos and courses for the CamaroConvertible that can be found on the GMTraining website.

It is recommended to view these trainingitems prior to beginning any repairs.

Immediately following replacement of the#5 bow assembly or any time the top as-sembly has been removed from the vehicle,as well as prior to cycling the top for thefirst time, it is necessary to follow the in-formation in the latest version of #PI0406to ensure that the Folding Top QuarterOuter Drain Panel (water management

bag) is not interfering with the top assem-bly. Failure to following the informationmay result in damage to the #5 bow.

Also refer to the April 2011 Emerging Issues seminar on www.gmtraining.com forinformation about inspection and finessingof the Folding Top Quarter Outer DrainPanel. In Canada, refer to the June 2011TAC Talk program.

Cloth Spots

Spots in the convertible top between thefirst and second bow on either side of thevehicle may be caused by a stack-up condition of the top. This will not have aneffect on the performance of the top.

Spotting may also occur if a headliner wasincorrectly installed, allowing the plasticsupport stitched into the corner of theheadliner to create a pressure point on theconvertible top cloth when stowed. Inspectthe front headliner attaching points on the#1 bow to confirm the proper position ofthe front headliner screws.

For both spotting conditions:

1. Wash the convertible top cloth usingsoap, water and a soft bristle brush.

2. Dry the cloth and confirm the spot is nolonger visible.

If the screws are in the correct positions,

no other repair is necessary. Otherwise,continue as outlined below to prevent future damage:

3. If the convertible top cloth is damaged, replace the convertible top cover follow-ing published SI procedures for FoldingTop Cover Replacement.

TIP: The Folding Top Cover Replace-ment procedure links to other repair documents in the Service Information. Itis critical that all steps be performed as directed to avoid additional damage andrepeat repairs.

4. Reposition the front headliner retainingscrews in the molded holes of the #1 bow.

Thanks to Jeremy Richardson

Install the adapter with thesupplied hardware . . .

Camaro Convertible Roof Cloth Appearance

… and then slide the USB cable through the adapter as shown.

Spots on roof cloth

Proper position of the front headliner screws

A. Correct locations for the screws at the front of the headliner

B. Incorrect screw locations

4 July 2011

The 2008-09 Saturn ASTRA has severalunique programming features. Techniciansmay not be familiar with all of the terminol-ogy, programming procedures and variousmodules on the vehicle. Following aresome of the items to keep in mind whenprogramming the ASTRA. Refer to#PIC5053B for more details.

Required Tools

The 2008-09 Saturn ASTRA requires itsown separate 10 or 32meg Tech 2 cardloaded with its own software. The softwarecan be loaded onto an old 10meg card or anewer 32meg card. A CANdi module willbe needed.

This vehicle does not use NAO softwareas used for other Saturn vehicles. TheASTRA software cannot be loaded ontothe existing Tech 2 card at the sametime as the current software. However,it can be installed over the existing NAOsoftware on a current 10 or 32meg cardfor quick use; then re-install the NAO software back onto the card if needed.All software can be found in TIS2Web. Always use the latest version available.

TIP: Do not leave the NAO andASTRA cards installed in the Tech 2 whenoperating or programming.

Security (Immobilizer) Code

Before beginning to program a module,it will be necessary to have the Security (Immobilizer) Code. This code can befound in the vehicle glove box on the Security Card/Car Pass (may not beon late 2008 models) or in GM GlobalConnect under the PARTS tab byselecting Key Code Look Up from the list(U.S. only).

The Key Code Look Up selection underthe PARTS tab is available only to Serviceand Parts managers. (See your dealershipSecurity Partner Coordinator if needed.)In Canada, use the Key Code Look Upfeature in the OEConnection D2DLink application.

TIP: The Radio and Immobilizer codesare always the same number and it is usedfor all module programming.

Do not confuse the Security Code with theKey No/Key Cut Code also found on theSecurity Card/Car Pass and the KeyCode Look Up. The key code has a letteras the first digit of the code, such asZ4625. The Tech 2 does not require security access to reset a module, but it isneeded for programming.

Security Access

The Astra has a unique feature when pro-gramming known as Security Access. Thisis not to be confused with the SecurityCode or SPS. You may be prompted forTIS approval when attempting an SPSevent. This is displayed on the Tech 2 asNo Programming Approval found.

When prompted with “No ProgrammingApproval found. Please get programmingapproval from TIS,” security access fromTIS2Web is needed. Power down the Tech2 at the request screen, install the externalpower supply to the Tech 2 and then connect the RS-232 cable between theTechline terminal and the Tech 2. Begin-ning with the Tech 2 at the start-up screenand on the TIS2Web home page in GMGlobalConnect, select the Security Access(Security) tab and follow the prompts.When finished, the Tech 2 will show security access enabled (Type 2 or 3).Next, select OK, power down the Tech 2,return to the vehicle and resume the previous programming from the beginning.

Remaining Security CodeInputs

The ASTRA is unique in its programmingevents. When performing a programmingprocedure with the Tech 2, a counter will denote/track each time the security codeis used, starting at 10 and working downto 0. This counter is running with everyevent, regardless if it was successful orunsuccessful. The number of events istracked, and with each entry, a time delaymay be enabled before a new entry can bemade. This number is listed as RemainingSecurity Code Inputs.

For example, two wrong entries is indicated as Retry Level #8 and enables a10 second delay in programming. Threewrong entries equals Retry Level #7 andenables a 10 minute delay before program-ming may be completed. The module willappear to program but the settings will nottake. See #PIC5006 for a chart thatshows wrong entries vs. timeout levels.

Reset Module

The Tech 2 identifies if the module has already been programmed. The first stepin replacing a module is the Reset process.The Reset menu is located under the mod-ule programming menu. The Reset proce-dure should pull the required informationfrom the old module and transfer that intothe new module when programming. How-ever, it may not be apparent that this hasoccurred. To review and manually recordmodule information that may be neededfor programming the service part, selectthe desired module on the Tech 2 andenter the Programming menu. Next, selectInfo to view module information, such aspart number, serial number, code index,software, etc. This is especially helpfulwith Radio/EHU (Entertainment HeadUnit)/DIS (Driver Information System) replacements.

If the old module does not communicate, areset cannot be performed and the modulewill have to be set up manually. You will beprompted to select variants and bus con-figurations when the Tech 2 programmingis performed. When manually program-ming modules, each ECU in the vehiclemust be updated to Present status withthe new bus configuration.

To change the ECU to Present status onthe High/Mid/Low Speed CAN Bus:

1. Select each ECU

2. Press the Modify key

3. Select Present

4. Press the Confirm key

Follow this procedure for each ECU. Makesure each ECU selected is correct for thevehicle configuration/options. Failure toselect the correct options will cause additional codes to set after programming.If incorrect options were selected and newcorresponding DTCs set, the module vari-ants must be programmed again correctly.

Clearing DTCs

When clearing DTCs, the process mayseem to be performed twice. The Tech 2

Programming the ASTRA

July 2011 5

Rear Park Assist Connector

On some 2011 Silverado and Sierra models, a Service Park AssistMessage may be displayed on the Driver Information Center and anyor all of the following DTCs may be set: B01405, B0958, B0959,B0960, or B0961.

This condition may be the result of the X408 connector not being fullysnapped together. On initial inspection of the connector, it may appearto be fully connected. Check the connection to ensure that it issnapped together and fully engaged.

Thanks to Jim Will

Volt CoolingSystem Service

Power Seatback Recliner

When servicing any of the cooling systems on the2011 Volt, which includes the pumps, reservoirs,hoses, air separators, radiators, Power InverterModule (PIM), high-voltage battery assembly, engine or heater system, it is important to use theproper coolant and water mixture.

The Power Electronics/Charging and Battery Cooling systems require a 50/50 mix of DEX-COOL® and de-ionized water. This mixture is avail-able in a pre-mix with bitterant, part numbers12378390 (U.S.) and 10953456 (Canada).

The pre-mixed coolant is no longer available withoutthe bitterant chemical. Bitterant is a chemical that isadded to products to make them smell or taste ex-tremely bitter and is required in some states. If thepre-mixed coolant is unavailable during service ofthe above listed systems, make sure to use a 50/50mix of concentrated DEX-COOL, part numbers12346290 (U.S.) and 10953464 (Canada), and de-ionized water only. DO NOT use tap water ordistilled water.

Thanks to Chuck Krepp

X408 connector

The power seatback recliner may be inoperative on some 2011 Camarosbuilt prior to May 6, 2011. This condition may be caused by poor electricalcontact due to a buildup of flux film on the contacts of the recliner inhibitmicro switch.

To clean the flux film from the micro switch, perform the following:

1. Activate the recliner switch to recline the seatback. While the seatback is inmotion, cycle the seatback latch handle, on the back of the seat, five times.

TIP: If seatback does not start moving in step 1, cycle the seatback latchhandle repeatedly while activating the recliner switch until the seatback be-gins to move.

2. Once the seatback reaches its fully reclined position, hold the recliner switchfor an additional 5 seconds and then release the switch.

3. Activate the recliner switch to raise the seat back slightly and then reclinethe seatback again. Once it reaches its fully reclined position, hold the re-cliner switch for an additional 5 seconds and then release the switch.

4. Using the power recliner switch, raise the seatback up to the full forward po-sition.

5. Activate the recliner switch to recline the seat back. While the seatback is inmotion, cycle the seatback latch handle, on the back of the seat, six times.

Thanks to Jeremy Richardson

Programming the ASTRA – continued from page 4

will prompt to confirm the deletion, and then clear the DTC in twoseparate steps. Make sure the codes are cleared by performingthe procedure twice.

Radio/Display

If an incorrect selection is made during programming, theRadio/Display may fail to unlock and stay in the Safe/Deliverymode. Check and note any codes setting; clear them before resuming programming.

Power Steering Control Module (CIM- Column Integration Module)

Before beginning to program this module, it is necessary to havethe Security Code and the mechanical key cut code. Also checkthe vehicle options in VIS for RPO FX3 (StabiliTrak/Stability Control). If this option is present, the yaw rate sensor will need to

be calibrated after programming. The yaw rate sensor is referredto as the Cluster Sensor in the Tech 2. Before calibration of theyaw rate sensor, be sure any codes in the EBCM are historycodes. Clear the codes twice. The calibration will not completewith any DTCs set in the EBCM as present codes.

Code Index

When replacing a module, such as the IPC, EHU (radio), or EHPS(Electrohydraulic Power Steering), it’s necessary to have the programming Code Index and Version in order to complete programming. This code should not be confused with the SecurityCode. The Code Index is a 3 digit number and is not listed on theCar Pass/Security Card. The Version may be a one or two digitnumber. These are only listed in the module and in the Service Information.

Thanks to Mike Waszczenko and Bryan Brunner

6 July 2011

The installa-tion stepsfor the AccessoryWindscreen(part number19156012)on the 2011CorvetteConvertiblehave beenrevised. Anupdate tothe trimbezel fasten-ing systemwill require new steps to fit the existing components tothe vehicle.

Additional installation information can be found in#PI0476 in the Service Information. It supplements theinstallation sheet that accompanies the windscreen. Usethe information in #PI0476 along with the installationsheet when installing the windscreen.

Thanks to Ann Briedis

Corvette ConvertibleWindscreenInstallation

VIN Cards Available on GM GlobalConnect

The left and right trim bezels must bemodified when installing the windscreen.

GM Vehicle Iden-tification Number(VIN) cards for allGM vehicles areavailable in GMGlobalConnect(U.S. andCanada) as wellas via the ServiceInformation (SI)and the ACDelcoTechConnectwebsite.

The VIN card information isavailable from thecurrent model back to 1972 (U.S) and 2003 (Canada).

GM GlobalConnect

In GM GlobalConnect, users may ask their dealership Partner Security Coordinator (PSC) to add a link to their user profile titledVehicle Identification Number (VIN) Information, available underthe Service tab/Service Workbench.

Service Information

To access the VIN decoding information in SI, build a vehicle withdivision, make, and model year information, select the Service

Manual, andthen go to General Informa-tion > GeneralInformation sub-section >Introduction >Vehicle, Engineand TransmissionID and VIN Location, Deriva-tive and Usage.

ACDelco

On the web, VIN information isavailable without a password, account or login requirements viathe ACDelco TechConnect website. Customers, government agencies, independent repair facilities, and any other outside bodythat requires GM VIN decoding information should use this methodof access.

To access GM VIN information on the web, go to www.acdelcotechconnect.com and click the link on the left side ofthe page labeled GM VIN Information. Click the desired modelyear from the displayed list.

Thanks to Mike Golinski

Truck Accessory SoftTonneau CoverOn some Silverado and Sierrapickups with the accessorysoft tonneau cover, the covermay not be securely fastened,and as a result, the customermay comment about a loosecover condition. This typicallyoccurs on vehicles with lowmiles.

Upon inspection, techniciansmay find that the front latchesare not fully engaged.

Review the installation trainingvideo, Soft Tonneau AccessoryInstallation, on the October2010 Emerging Issues seminar(10210.10D), which can befound through the GM trainingwebsite. In Canada, refer tothe November 2010 TAC Talkprogram.The video is alsoavailable on You Tube for customers to view. Search forGM Soft Tonneau onwww.YouTube.com.

Thanks to Ann Briedi

The latches must be engaged with the side rails with the

wind bolts tightened.

Soft tonneau cover front latch

VIN information (U.S) VIN information (Canada)

July 2011 7

GM TechLink is a monthly magazinefor all GM retail technicians andservice consultants providing timelyinformation to help increase know ledgeabout GM products and improve theperformance of the servicedepartment.

Publisher:Thomas J. Arnold

GM Customer Care and Aftersales /Thomas.Arnold@GM.com

Editor:Lisa G. Scott

GM Customer Care and Aftersales /Lisa.G.Scott@GM.com

Technical Editor:Mark Spencer

/mspencer@gpworldwide.com

Production Manager:Marie Meredith

Desktop Publishing:5by5 Design LLC

/dkelly@5by5dzign.com

FAX number: 31-248-729-4704

Write to: *TechLinkPO Box 500Troy, MI 48007-0500

GM TechLink on the Web: :GM GlobalConnect

General Motors service tips are intendedfor use by professional technicians, not a“do-it-yourselfer.” T hey are written toinform those technicians of conditions thatmay occur on some vehicles, or to provide information that could assist in the properservice of a vehicle. Properly trainedtechnicians have the equipment, tools,safety instructions and know-how to do ajob properly and safely. If a condition isdescribed, do not assume that theinformation applies to your vehicle or thatyour vehicle will have that condition. See aGeneral Motors dealer servicing yourbrand of General Motors vehicle forinformation on whether your vehicle maybenefit from the information.Inclusion in this publication is not necessarily an endorsement of theindividual or the company.

Copyright© 2011 General Motors All rights reserved.

ServiceKnow-How

10211.07D Emerging Issues

To view Emerging Issues seminars:Log in to www.gmtraining.com, select Service Know-How/TECHAssist from the menu, select Emerging Issues, and thenSearchable Streaming Video to choose the current EmergingIssues seminar or past programs.

July 14, 2011

The power liftgate (RPO E61) may be inoperative with the key off on some2007-2011 Escalade, Escalade ESV, Suburban, Tahoe, Yukon, Yukon XL, andYukon Denali models.

If this condition is present, the power liftgate will be inoperative from all theswitches and the Remote Keyless Entrytransmitter only with the ignition in the Offposition. If the ignition is in the Accessoryor the Run position, the liftgate will oper-ate properly.

Check for power on the Accessory WakeUp Data Line going to the ECM and theTCM. With the key in the Accessory position, check for battery voltage on circuit 5985 going to pin 18 (2007 modelyear) or pin 31 (2008-2011 model year) ofconnector 1 of the ECM and pin 11 (MT1transmission) or pin 9 (MYC transmission)to the TCM.

If no voltage is present with the key in theAccessory position, check for a wiring orpin fit condition.

Thanks to Scott Fibranz

Power Liftgate Inoperative with Key Off

New Labor Operation for Battery Replacements underRoadside Service

The HVAC system on some 2008-2011 Cadillac Escalade models, Avalanche, Silverado,Suburban, Tahoe, Sierra, Yukon, Yukon Denali, Yukon XL, and Yukon XL Denali with automatic air conditioning (RPO CJ2) may not always respond to requests for changesin air delivery or temperature from the HVAC controls. When using a scan tool, theHVAC control module will communicate but the HVAC door data actual counts will read0 counts.

Follow the diagnostics in the Service Information for the specific condition or DTC but ifdirected to replace the HVAC control head module, perform the following check: Test forvoltage at terminal 9 at the HVAC control module circuit 300 with the key in the Run position.

If battery voltage is not present, inspect for an open condition in circuit 300 between theHVAC control head and the BCM.

Thanks to Troy Zell

HVAC Temperature and Air Delivery Response

A new labor operation, Z8004, has been established for warranty battery replacementsunder the Cadillac Roadside Service program (U.S. only). Use this new labor operation inplace of the previous labor operation, N0110.

Cadillac dealerships enrolled in the Cadillac Technician program continue to have the option to replace a battery when it will not hold a charge and cannot be jump-started.However, if the vehicle is beyond the bumper-to-bumper warranty, but still under the powertrain warranty, the battery is considered a customer pay item.

Thanks to Jean Hart

8 July 2011

Car Issues – Fix It Right the First Time

ModelYear(s) Vehicle Line(s)/Condition Do This Don’t Do This Reference

Information/Bulletin

2011 CTS Coupe, CTS-V Coupe – Memoryseat/mirrors switch buttons intermittently stick

Replace memory switch bezel Replace entire door trimpanel

PI0468

2006 -2011

Impala – Police Package – Suspensionbottoming

Replace front strut jouncebumpers only on GM OEM struts

Attempt to install newjounce bumper onaftermarket struts

11-03-08-002

2007 -2009

Grand Prix, Impala, LaCrosse – MIL illuminatedwith Secondary Air Injection DTCs

Replace SAI pump relay Replace SAI pump orcheck valve

PI0463

2010 -2011

Cruze, Equinox, LaCrosse, Regal, SRX, Terrain,Volt – Steering wheel adjustment lever sticks

Install thrust washer availablefrom the WPC

Replace the steeringcolumn

PI0462

2010 -2011

LaCrosse – Memory seat intermittently does notreturn to programmed position

Reprogram the memory seatmodule for vehicles equippedwith Side Blind Zone Alert

Replace the memory seatmodule

PI0431

2010 -2011

Camaro, Cruze, Equinox, LaCrosse, Malibu,Regal, SRX, Terrain – Radio display missing datausing USB

Check cell phone function andsoftware version; update cellphone software as necessary

Replace the radio PI0055B

2004 -2012

All Vehicles – Appearance of chromed aluminumwheels

Audit cleaning and prep productsto ensure they don't include anyunapproved ingredients

Submit warranty claimsto pay for wheelsdamaged by improperchemicals inmaintenance andcleaning products

00-03-10-002F

2008 -2011

Enclave – Fuel filler door binds Modify fuel filler pocket Replace the fuel fillerdoor

PI0458

2010 -2011

LaCrosse – MIL illuminated after cold start withrandom misfire counts

Re-flash vehicle Replace injectors, ECMs,spark plugs

PI0459

2010 -2011

Acadia, Enclave, Traverse – MIL illuminated aftercold start with random misfire counts

Re-flash vehicle Replace injectors, ECMs,spark plugs

PI0473

2011 Cruze – Supplemental repair required for HVACcondenser inoperative/replacement due toforeign material impact

Install the front bumper lowerfascia center grille in addition tothe condenser

Replace condenser PI0461

2011 Camaro – Folding top tonneau cover Install the tonneau coverhardware that is located in thetonneau cover bag

Forget to install thetonneau cover hardware

PI0351A

2011 Camaro – Rattle from rear compartment areawhen driving with convertible top in closed (up)position

Install adhesive backed foamrubber material to the vehiclebody

Replace trunk trim PI0449

2011 Camaro – Rattle, noise in rear floor area Install damping mastic patch tofloor area

Replace suspension parts PI0424

2011 Cruze – MIL illuminated with DTC P059F andP069E set

Replace radiator air baffle Replace the fuel pumpcontrol module

PI0467

2002 -2011

Avalanche, Corvette, CTS models, CTS-Vmodels, DTS, Escalade models, Lucerne, Seville,STS, Suburban, Tahoe, XLR, XLR-V, Yukonmodels – Magnaride magnetically-controlledsuspension electrical connector not seated

Check the connector. Swap theconnector from side-to-side tocheck if the problem follows theconnector

Automatically replace themagnetically-controlledsuspension strut

PI0430A

2011 Regal – Center console door will not open orstay closed

Relocate the harness behind thecenter console door

Replace the centerconsole assembly

PI0317

July 2011 9

Truck Issues – Fix It Right the First Time

ModelYear(s) Vehicle Line(s)/Condition Do This Don’t Do This Reference

Information/Bulletin

2007 -2012

Avalanche, Canyon, Colorado, Envoy, Express,H3, Saab 9-7X, Savana, Sierra, Silverado,Suburban, Tahoe, TrailBlazer, Yukon, YukonDenali, Yukon XL, Yukon XL Denali – Harsh 1-2shift after transmission service

Install 1-2 accumulatorsprings only as indicated in SIusage chart

Install outer 1-2 accumulatorspring #54 unless indicatedin SI usage chart

PI0445

2010 -2011

Avalanche, Escalade, Escalade ESV, EscaladeEXT, Sierra, Silverado, Suburban, Tahoe, Yukon,Yukon Denali, Yukon XL, Yukon XL Denali – A/Cblows warm air intermittently

Update calibration Replace controller oractuators

11-01-39-002

2007 -2009

Montana SV6, Relay, Terraza, Uplander – Glovebox door hinge loose

Replace only the failed glovebox door hinge

Replace the complete glovebox compartment assembly

PI0471

2007 -2012

Sierra, Silverado – Carpet curling at front edge Install tape Replace carpet 09-08-110-002A

2011 Sierra, Silverado (HD models only) – New tirebalance information for dual rear wheel andsingle wheel trucks

Balance tires Replace tires or wheels PI0460

1999 -2011

Avalanche, Express, Savana, Sierra, Silverado,Suburban, Yukon XL – Rear leaf spring slap orclunk noise

Replace inserts Replace leaf springs 03-03-09-002D

2007 -2012

Avalanche, Escalade, Escalade ESV, EscaladeEXT, Sierra, Silverado, Tahoe, Yukon, YukonDenali, Yukon XL, Yukon XL Denali – Instrumentpanel HVAC air outlet deflector knob chromeinsert loose

Replace chrome insert Replace air outlet deflector 11-01-37-001

2010 -2011

Express, Savana, Sierra, Silverado –Appearance of edges/openings on chromebumpers

Remove paint overspray Replace bumper PI0437

2003 -2010

Express, Savana – Fuel tank vent hose quickrelease connector available for service use

Replace valve Replace hose assembly PI0427

2010 Express, Savana – Driveline squeak noise orvibration on acceleration

Replace both propeller shaftuniversal joints

Replace propshaft PI0438

2007 -2011

Avalanche, Escalade models, Sierra, Silverado,Suburban, Tahoe, Yukon models – Chromeoutside door handle loose

Replace door handle withimproved part

Use previous door handleparts

09-08-64-032A

2010 Express, Savana – Driveline noise onacceleration

Replace only the U-joints Replace the entire driveshaft PI0438

Customer Care and Aftersales