August 2012, Volume 14, No. 8

Introducing the All-New

2013 Cadillac

XTS The 2013 Cadillac XTS, the newest addition to the Cadillac luxury sedan lineup, is the most technologically ad-vanced production car in the brand’s history. The XTS is larger than the CTS, and delivers entirely new and advanced technologies tuned for a new generation of luxury customers.

The XTS, a front-wheel drive or all-wheel drive sedan, is offered in a well-equipped standard model and three optional col-lections: Luxury, Premium and Platinum.

Some of the following highlighted equip-ment is available as an option.

Cadillac User Experience (CUE)

The Cadillac User Experience (CUE) makes its debut in the XTS. CUE borrows the gestures used on tablets and smart phones and brings them to a car, with home pages, less text, large icons and the ability to customize information.

TIP: Full functionality requires a com-patible Bluetooth-enabled smartphone. Some devices require USB connectivity.

Every 2013 XTS sold in the U. S. will in-clude an iPad®, customized with the CUE app, the MyCadillac app and the OnStar® Remote Link mobile app, that replicates

many of the controls and features of CUE.

Customer Care and Aftersales

Contents

All-New 2013 Cadillac XTS . . . . . . . . . . . . . . . . . . . 1GDS 2 Scan Tool Updates . . . . . . . . . . . . . . . . . . . 1Mid-Model Year Cruze Changes . . . . . . . . . . . . . . . 3First Use of New R-1234yf Refrigerant . . . . . . . . . . 4MyLink and IntelliLink Radio Options . . . . . . . . . . . 5Cell Phone Hands-free Performance . . . . . . . . . . . . 5Draining the Volt High-Voltage Battery Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5New Dual Brake Pedal Position Sensor . . . . . . . . . 6Brake Pressure Modulator Valve Replacement . . . .6Erratic Backlight Operation . . . . . . . . . . . . . . . . . . . 6Passenger Presence System Loss of Communication . . . . . . . . . . . . . . . . . . . . . . . . . . 7Power Steering Powerpack Replacement . . . . . . . . 7Malibu Eco Active Grille Shutter . . . . . . . . . . . . . . 7IntelliBeam High Beam Control Testing . . . . . . . . . . 8Instrument Panel Tweeter Noise . . . . . . . . . . . . . . . 8No Crank, No Communication with GM LAN after Service . . . . . . . . . . . . . . . . . . . . . . . 8Service Know-How . . . . . . . . . . . . . . . . . . . . . . . . . 8Car Issues – Fix It Right the First Time . . . . . . . . . . 9Truck Issues – Fix It Right the First Time . . . . . . . . . 9

continued on page 2

TECHLINEnewsNo Communication Conditions and GDS 2 Scan Tool Updates The Global Diagnostic System 2 (GDS 2) scan tool core updates are automatically pushed out when the GDS 2 lease is renewed every seven days. However, it is up to the individual techni-cian to update the GDS 2 scan tool diagnostic packages when they become available.

TIP: It is important to always update the GDS 2 scan tool when new versions are re-leased. Notification of diagnostic package updates will appear on the Home page. Click the Update button to download.

A recent example is on the 2012 Camaro ZL1 where the GDS 2 scan tool may not list the suspension control module in the Module Diagnostics; however the DTC check may show the suspension control module as not connected. If a suspension

Notification of updated diagnostic packages will

appear on the Home page.

continued on page 2

2 August 2012

ized into one of three screen layouts that mix traditional vehicle data, such as readouts for fuel level and speed, with navigation, phone and entertainment information. The instrument cluster also features a 3-D animated car with performance data callouts.

Powertrain

The XTS features a 3.6L V-6 direct injection engine (RPO LFX) that generates 304 horsepower (226 kW) @ 6,800 rpm and 264 lb-ft (358 Nm) of torque @ 5,200 rpm.

The engine is matched with a Hydra-Matic 6T70 or 6T75 six speed automatic transmission, depending on build content (RPOs M7U, M7W, MV7). The XTS has an available smart Haldex all-wheel drive system, with an electronic limited-slip differential that splits torque between the rear wheels.

Transmission shift paddles are mounted on the steering wheel and have fulltime functionality, so the driver can tap-up or tap-down directly from the steering wheel paddles. The new tap-cancel feature returns the transmission to the automatic mode when the right paddle is pulled and held for 2 seconds.

Chassis

The XTS comes standard with Brembo front brake calipers that have an Auto Dry brake feature and 13.58-inch (345 mm) brake rotors. The rear rotors are 12.40 inches (315 mm). All disc brake rotors use the Ferritic Nitro-carburizing (FNC) process to reduce corrosion.

The XTS is the only luxury sedan with standard Magnetic Ride Control. The electronically-controlled front and rear shocks are filled with a magneto-rheological fluid containing minute iron particles. Under the presence of a magnetic charge, the iron particles align to change shock absorber damping in as little as five milliseconds.

In addition the XTS features the advanced GM high performance HiPer Strut front suspension design. It features dual-path top mountings that separate the transfer of spring and damper loads to the body structure.

The rear suspension uses a linked H-arm design and air suspen-sion to provide Automatic Level Control (ALC). The air springs are mounted in the same location where coil springs normally would be mounted.

Global Diagnostic System 2 (GDS 2)

The XTS uses GM’s Global A electrical architecture, which is common with the Buick LaCrosse, Cadillac SRX, and other recently introduced models. This architecture requires the use of the Global Diagnostic System 2 (GDS 2) software and the Multiple Diagnostic Interface (MDI) module.

R-1234yf Refrigerant

A new A/C refrigerant is being introduced in the XTS. R-1234yf is a new environmentally friendly refrigerant that has a 99.7% lower Global Warming Potential (GWP) than R-134a. It requires new service procedures and tools. For more information, refer to the accompanying article on R-1234yf refrigerant.

Unique Vehicle Characteristics

Door Lock – The Remote Keyless Entry transmitter has a stan-dard key inside of the remote fob that can be accessed by pushing on the fob release button. This key can unlock the driver’s door

CUE features include:

LCD Touch Screen – The heart of CUE’s center stack display is the vivid eight-inch (203 mm) LCD touch screen. The cen-ter stack has only seven buttons, four of them for the radio.

Proximity Sensing – As the user’s hand ap-proaches the screen, icons appear and carry out commands. Icons can be customized and arranged by the user.

Haptic Feedback – Buttons on the faceplate and screen pulse when pressed to confirm that the command is being carried out.

Capacitive Multi-Touch Interface – Interactive gestures (such as tap, flick, swipe and spread) make it easy to scroll through lists, enlarge maps or search for favorites, just as with a tablet or smartphone. With a simple swipe of a hand, turn-by-turn navigation and audio information can be moved from the center display to the instrument cluster.

Natural Language Speech Recognition – Users speak as they would in a normal conversation and not with awkward commands and sequences.

Software Updates – CUE software can be upgraded during the life of the vehicle, so the infotainment system never becomes outdated.

Reconfigurable 12.3-inch LCD Instrument Cluster – Available on select models, the instrument cluster can be custom-

2013 Cadillac XTS – continued from page 1

continued on page 3

continued from page 1

Reconfigurable LCD instrument cluster

DTC exists, the Electronic Brake Control Module (EBCM) may have a stored DTC U0421 (Invalid Data Received from Suspension Control Module) Symptom 71. In this case, if the GDS 2 scan tool diagnos-tic package is version GM Global v2012.3.1 or older, it will not show the suspension control module.

Always update the GDS 2 scan tool diagnostic package to the latest version available and, any time a communication condition is encountered, verify the latest update is being used.

Thanks to Jeremy Richardson and Matt Singer

TECHLINEnews

CUE system

August 2012 3

2013 Cadillac XTS – continued from page 1

only after first remov-ing the cover that conceals the lock cylinder located on the end of the door handle. To access the key cylinder, pull the door handle and insert the key into the slot on the bottom of the cap to pry it out-ward; then move the cap rearward.

Capless Fueling System – The capless fueling system helps keep hands free of dirt and fuel and avoid an illuminated Check En-gine Light due to a loose gas cap. When the fuel nozzle is inserted into the opening, it pushes aside two doors, each locking fuel in with a rubber seal around its edge.

TIP: If the vehicle is refueled with a portable gas can, the funnel in the rear trunk compartment must be used.

Acoustic Glass – The XTS is equipped with acoustic glass in the front windshield and the front driver and passenger doors. Acous-tic windshields are made with a thin, sound absorbing technology that reduces the interior noise by 3dB overall, and even more in the frequency where people hear the human voice. This technology allows using thinner, lighter glass without sacrificing cabin comfort.

TIP: Do not hang key lock boxes on the acoustic glass.

Safety Features

The XTS introduces a network of cameras, radar and ultrasonic sensors to help the driver avoid crashes by improving their vision and awareness of road hazards, even braking automatically if sensors predict the vehicle is at risk of crashing. Available safety features include:

Safety Alert Seat – The standard industry-first Safety Alert Seat feature pulses either the left or right side of the driver’s seat cushion to warn the driver of an impending concern, with sufficient warning time to give the driver time to react and make changes. XTS also offers a 360° network of cameras and sensors to enhance driver vision.

Automatic Collision Preparation – When the vehicle sensors determine a collision is imminent, braking is applied to lessen the impact severity with the vehicle detected ahead or even enable the driver to avoid the incident.

Forward Collision Alert – Radar and camera technology detect a possible front end collision threat and alert the driver. The alerting time can be set to far, medium or near settings.

Front and Rear Automatic Braking – Using radar and ultrasonic sensors, this feature can help prevent or mitigate front and rear collisions at low speeds using a progression of alerts that extend to complete braking if necessary.

Lane Departure Warning – The camera-based lane detec-tion system identifies traffic lane markings and warns the driver of unsignaled lane changes. If a turn signal is not used, it will send a warning by providing audible alerts or by activating the Safety Alert Seat. The system activates at speeds above 35 mph (56 km/h).

Rear Cross Traffic Alert – Using radar sensors, the driver is alerted of approaching cross traffic when backing out of a parking spot, including angled parking.

Side Blind Zone Alert – The system uses radar sensors in the left and right side corners of the rear bumper to look for vehicles in the blind zone areas and indicate their presence by illuminating symbols in the outside rear view mirrors.

Special Tools

The following new tools have been released for the 2013 Cadillac XTS:

Pre-Delivery Inspection (PDI)

Review the Pre-Delivery Inspection (PDI) and Completely Satisfied Delivery System (CSDS) forms for the XTS. There are several Special Inspection Items highlighted for this vehicle. Additionally the CSDS form has important customer education items that have been identified during the Captured Test Fleet process.

For additional information about the new 2013 XTS, refer to Bulletin #PI0743.

Thanks to Wayne Zigler and Ed Laskowski

The key cylinder is behind the door handle cap.

Tool Number Description

DT-50806 Bushing Replacer, Front and Rear Cradles

GE-45268-130 R-1234yf Refrigerant Flush Adapters

GE-50078 Electronic Refrigerant Leak Detector

GE-50300 R-1234yf Refrigerant Recovery/Recycling Machine

GE-50744 R-1234yf Oil Injection Hose - PAG Oil

GE-50957 R-1234yf Contaminated Refrigerant Recovery Machine

Mid-Model Year Cruze ChangesOn some 2012 Cruze models, it may be noticed that the DRL (Daytime Running Lights) and/or the Reduced Engine Power indicators do not illuminate and the engine coolant temperature value in the Driver Information Center (DIC) is no longer displayed after the vehicle was in for

service that required the replacement of the Instrument Panel Cluster.

There was a mid-model year change (midway through March) to the Instrument Panel Cluster in which the DRLs and the Reduced Engine Power indicator no longer

illuminate and the engine coolant tempera-ture no longer is displayed in the DIC.

This is normal operation and no repairs should be made.

Thanks to Chris Hightower

4 August 2012

First Use of New R-1234yf Refrigerant in 2013 XTSA new air conditioning refrigerant, R-1234yf, is being introduced in the 2013 Cadillac XTS and upcoming ATS. R-1234yf is a new environmentally-friendly refrigerant that has a 99.7% lower Global Warming Potential (GWP) than R-134a. GWP is a value used to compare different greenhouse gases.

R-1234yf stands for a specific compound: 1 – double bond, 2 – hydrogens, 3 – carbons, 4- fluorines, yf – position of the fluoro atoms. It is the industry accepted solution for a low GWP refrigerant.

The new refrigerant is considered mildly flammable and has thermodynamic properties similar to R-134a. R-1234yf systems require the use of specific A/C compressor oils.

Revised Service Procedures

TIP: As with all refrigerants, always work in a well-ventilated area and never release refrigerants into the atmosphere.

Technicians repairing or servicing motor vehicle air conditioning (MVAC) systems in the U.S. must be trained and certified by an EPA approved organization. Certification is obtained by passing an EPA approved examination. Go to http://www.epa.gov/ozone/title6/609/technicians/609certs.html for more information.

In Canada, provincial regulations require that all motor vehicle air conditioning service technicians must be trained and certified.

Vehicles equipped with R-1234yf refrigerant systems have unique low and high side service fittings, internal heat exchangers (IHX), and SAE J2842-compliant evaporator cores.

There are new or revised service procedures for R-1234yf equipped vehicles (Refer to the appropriate Service Information for details):

•RefrigerantRecoveryandRecharge

•LeakTest

•EvaporatorCores

• InternalHeatExchanger

A/C Compressor Oils

R-1234yf systems require the use of specific A/C compres-sor oils. Refer to HVAC > Specifications > Adhesives, Fluids, Lubricants and Sealers in the Service Information for proper type and use.

Only GM lubricant is approved. The XTS A/C system uses P/N 19260643 (in Canada, P/N 19260644) and the ATS uses P/N 19299051 (in Canada, P/N 19299052).

New Tools and Equipment

New tools and equipment are required to service vehicles equipped with R-1234yf.

GE-50300 Recovery/Recycle/ Recharge Machine for R-1234yf A/C Systems — (certified to SAE J2843) Performs gas analysis before gas recovery or fills with recovery/fill lockout if gas is contaminated (less than 98% R-1234yf). VIN input is required. The VIN is retrieved via an integrated VCI cable con-nected to the vehicle’s OBD2 connector or may be manually en-

tered. It records and prints VIN, pressures, temperature, recovered/charged amount, gas analysis results and encrypts into a warranty code. A printed summary of the completed repair from the GE-50300 is required to be attached to each Repair Order and a warranty code is required to be entered into the comment field of warranty claim for reimbursement.

TIP: The GE-50300 Recovery/Recycle/Recharge Machine for R-1234yf A/C Systems requires product activation within 30 days of the machine’s initial startup. Refer to the Quick Start Guide and follow the on-screen instructions to complete the on-line registration and product activation process.

GE-50957 Contaminated Refrigerant Recovery Machine — (certified to SAE J2851) Required for recovery of contaminated refrigerant systems.

GE-50078 Electronic Refrigerant Leak Detection for R-1234yf and R-134a (certified to SAE J2913 for use on R-1234yf systems and certified to SAE J2971 for R-134a systems). The SAE J2843-certified equipment (GE-50300) requires a SAE J2913-certified leak detector to perform the mandated gross leak check.

GE-50744 R-1234yf PAG Oil Injection Hose — Used to replace PAG oil in R-1234yf systems with belt-driven A/C com-pressors. Use with GE-45037 and the oil specified in the Service Information.

GE-45268-130 R-1234yf Fitting Kit – Refrigerant Flush Kit — Required to adapt GE-45268 Flushing Kit to R-1234yf.

Thanks to Frank Rogers

GE-50300

Parts Information

Part Number Description

19260234 (19260235 Canada)

R1234yf Refrigerant (supplied in 4.5 kg cylinders)

19260643 (19260644 Canada)

XTS A/C Compressor Oil

19299051 (19299052 Canada)

ATS A/C Compressor Oil

12346287 (10953458) Canada

Dye, R1234yf Refrigerant System

August 2012 5

MyLink and IntelliLink Radio OptionsGMC models built without the Chevrolet MyLink, Buick IntelliLink or GMC IntelliLink connected color radio (RPO UP9), it is not pos-sible to upgrade to this radio due to the com-plexity of the wireless interface. Refer to the SPID label to verify a vehicle’s optional content.

Models with MyLink/IntelliLink

The following models offer the MyLink or IntelliLink radio:

2012 Model Year

•Equinox

•LaCrosse

•Regal

•Terrain

•Verano

•Volt

2013 Model Year

•Camaro

•Cruze

•Equinox

•LaCrosse

•MalibuEco

•Malibu

•Regal

•Spark

•Sonic

•Terrain

•Verano

•Volt

Color Radio RPOs

Direct customers who would like assistance with Bluetooth pairing, application downloading and installation, mobile device compatibility and operation of the MyLink/IntelliLink radios to: www.chevrolet.com/mylink; www.buick.com/intellilink; or www.gmc.com/intellilink.

Customers also may contact Customer Assistance at 1-855-478-7767.

In Canada information can be found at: www.chevrolet.ca; www.buick.ca; or www.gmc.gm.ca.

Once on the divisional page select MyLink or IntelliLink from the Owners drop-down menu or the badge lower on the page.

Customers also may contact the GM Canada Customer Care Centre at 1-800-263-3777 (English) or 1-800-263-7854 (French).

Thanks to Doug Daugherty and Katul Patel

RPO UFU – UP9 (Minus UP9)

Entry Color Radio. Bluetooth is in the OnStar module, not the radio (No MyLink/IntelliLink)

RPO UFU & UP9 Connected Color Radio, in-cludes Bluetooth connectivity (MyLink/IntelliLink)

RPO UHQ & UP9 Connected Navigation Radio, includes Bluetooth connectivity (MyLink/IntelliLink)

RPO UF7 (avail-able on Spark and Sonic models)

BYOM Connected Color Radio, includes Bluetooth connectivity (MyLink)

Cell Phone Hands-free PerformanceVoice dropouts, excessive noise cancellation and muffled sounds may be noticed by some owners of 2008-2013 GM passenger cars and trucks equipped with Bluetooth (RPOs UPF, UWE, UP9). These conditions occur more often with Blackberry devices.

These audio quality conditions may be due to the echo and noise cancel-lation features on the personal cell phone in use.

To improve the quality of communica-tions, advise owners to turn off the echo control and/or noise cancellation features, if supported, on the personal cell phones that are paired to the vehicle. These features may not be available on all cell phones, but are features on many Blackberry phones.

For example, to turn off echo control on a Blackberry 9630 or 9650 phone, follow these steps:

1. Choose Options (wrench icon) > Network & Connections > Bluetooth Connections. A list of paired devices will be displayed.

2. Select a paired device (e.g., Your Vehicle). A pop-up menu will be dis-played.

3. Choose Device Properties

4. Scroll down to Echo Control, and from the drop-down menu, change it to OFF.

5. Select Save.

For additional information, go to www.gm.com/bluetooth.

Thanks to Jon Nowak

Draining the Volt High-Voltage Battery Cooling SystemWhen performing any service work on a 2011-2013 Volt that requires removing the high-voltage battery pack or disconnecting any electrical connections at the Battery Bulkhead Disconnect Unit (BDU), the coolant from the drive motor battery cooling system should be drained first. Drain-ing the cooling system before begin-ning repairs will prevent coolant from entering any open electrical connec-tors or harnesses.

Any coolant contacting the terminals will quickly result in corrosion and multiple Diagnostic Trouble Codes (DTCs). Follow the appropriate Ser-vice Information to disable high volt-age and fully drain the battery coolant.

It also may be helpful to use electrical tape to seal the connections on the battery replay junction block and to protect the harness connectors with a plastic bag and cable tie strap.

Before beginning service repairs, also perform a visual inspection of the drive motor battery cooling system reservoir fluid level. If the coolant level of the drive motor cooling system reservoir is below the seam of the reservoir, per-form leak inspection diagnostics.

Anti-Tamper Coolant Bracket Installation at PDI

Ensure the anti-tamper high-voltage battery coolant bracket is installed to the passenger-side of the high-voltage battery coolant surge tank assem-bly. All Volts built after January 27, 2012 (VIN #CU113809 and higher) are shipped with the bracket in the rear compartment. The bracket is to be installed at the dealership during Pre-Delivery Inspection (PDI).

TIP: After performing the PDI road test and vehicle charge procedures, the high-voltage battery cooling system coolant level must be checked and adjusted if necessary prior to the anti-tamper bracket installation.

Thanks to Ashmi Haria

Protect the connections with electrical tape

6 August 2012

New Dual Brake Pedal Position Sensor New for many 2012 and later model year GM passenger cars and trucks equipped with an automatic transmission is the Electronic Brake Pedal Override feature, which reduces engine power if it detects that the brake pedal is applied while the accelerator is also applied. The Electronic Brake Pedal Override uses a dual Brake Pedal Position (BPP) sensor (two sensors in one). The dual BPP replaces the old style open/closed brake switch that has been used for years.

The dual BPP sensor is actually two separate variable resistors (two separate potentiometers activated by the same connection to the brake pedal arm), each working similarly to a Throttle Position Sensor. The resistors are housed in the same part and are not re-placeable separately. The dual BPP has three wires leading to the ECM and three different wires leading to the BCM.

After various service repairs, the dual BPP sensor requires a relearn procedure in both the BCM and ECM (for example, on 2012 Escalade, Avalanche, Express, Silverado, Suburban, Tahoe, Savana, Sierra, and Yukon models: BCM relearn – Service Information Document ID 1835636 and ECM relearn – Service Information Document ID 2655204). The relearn procedures will set the BPP sensor’s home values.

The BCM’s value is used to determine the action of the driver applying the brake pedal and to provide this information to the vehicle’s subsystems via the GMLAN communication bus. The ECM’s value is used for the new Electronic Brake Pedal Override feature.

The following service repairs will require a BPP relearn:

•Replacementorremovalofthebrakepedalhardware

•ReplacementorremovaloftheBrakePedalPositionsensor

•ECMreplacementand/orreprogram

•BCMreplacementand/orreprogram

• InstallationofanyGMaccessorythatrequiresprogrammingoftheECM or BCM.

Symptoms of an unlearned or incorrectly learned BPP sensor include:

BCM•DTCC0161(ABSBrakeSwitchCircuit)willsetintheElectronic

Brake Control Module (EBCM)

•ServiceStabilitymessage

•DTCC0277Sym4B(BrakeMasterCylinderPistonPosition Sensor) – Home position not learned

•Brakelightsstayonwithoutbrakepedalapplied

•Mustpressdownfartherthannormalonthebrakepedalto disengage the cruise control

•Mustpressdownfartherthannormalonthebrakepedaltoturnonthe brake lights

ECM•UnwantedElectronicBrakePedalOverrideactivation(lowpower,

feels like the vehicle is in a traction control or stability control event). If the Traction Control System (TCS) is turned off, the condition will not be present. There will be no indication to the driver that the system is active.

TIP: Other items that may disable the Electronic Brake Pedal Override include TCS disable, Vehicle Stability Enhancement System disable, 4WD Low range, and automatic transmission ranges M3, M2, and M1.

If any of the above conditions are experienced, perform a BPP relearn procedure for the BCM and ECM.

Thanks to James Will and Jack Woodward

DTCs Set after Brake Pressure Modulator Valve ReplacementIf the Electronic Brake Control Module (EBCM) has been replaced on a 2012 Sonic, a current DTC C0131 (Traction Control System Pressure Circuit Malfunction) may set current and there may be a Traction and Stability Control indicator light on in the instrument cluster. The brake pressure sen-sor voltage is 5 volts with brake pedal released or depressed.

Remove the Brake Pres-sure Modulator Valve (BPMV) assembly and inspect the brake pressure sensor assembly to verify that all shipping material has been removed before installation. If shipping material is not re-moved, this will cause DTC C0131 to set, and possibly damage to both the EBCM and the BPMV.

Thanks to Bryan Brunner

Verify that all shipping material has been removed from the

BPMV assembly.

Erratic Backlight Operation and Possible Battery DrainOn a 2013 Chevrolet Malibu Eco, the LED backlighting may not adjust with the dimming pot or the LED backlights may stay on with the igni-tion off. The 12V battery may also be discharged. The backlights include the headlamp switch, steering wheel controls, outside rearview mirror switch, door lock switches, over-head console switches and the integrated center stack. A battery draw of approximately 190 milliamps may be duplicated.

These conditions may be due to a fault in one of the dome lights in the overhead console. Disconnect the dome lights from the overhead console one at a time to confirm a faulty light. Replace the affected dome light and confirm the repair.

Thanks to Christopher Crumb

Malibu Eco dome lamps

August 2012 7

Passenger Presence System Loss of CommunicationOn a 2013 Chevrolet Malibu Eco, the Sensing and Diagnostic Module (SDM) setup cannot be completed after a program-ming event or the Passenger Presence System (PPS) will not zero, or commu-nication with low speed modules may be lost. These conditions may be caused by an incorrectly installed, mispositioned or damaged JX300 splice comb.

Remove the left rear door opening sill plate cover to check the splice comb in JX300. The comb may not be completely seated or may be damaged. Re-move and check the comb as well as check terminal tension of the female terminals in the splice con-nector and repair as needed.

Thanks to Christopher Crumb

Location of JX300

Check the splice comb in JX300

Malibu Eco Active Grille Shutter

Guidelines for Power Steering Powerpack Replacement

On a 2013 Chevrolet Malibu Eco, the Check Engine lamp may be illuminated and DTC P069E (Fuel Pump Control Module Requested MIL Illumination) may have set in the ECM. In addition, the FPCM (Fuel Pump Control Module) may have set DTC P059F (Active Grille Air Shutter Performance).

Inspect the active grille shutter for any signs of damage due to collision, ice, snow or road debris. Also check for inter-ference from the outside air temperature sensor wiring or connector.

With GDS 2 connected, command the shutter and confirm that it does not contact anything behind the grille, baffles or mountings. Perform a visual inspection on all connections.

If no conditions are identified, replace the active shutter assembly with actuator.

Thanks to Christopher Crumb

There may be a question whether to replace an Electronic Power Steering Gear Assembly or Powerpack (Module) only (RPO NJ1) on some 2011-2012 Cruze, Volt, Regal; 2010-2012 Equinox, LaCrosse, Terrain; 2012 Verano and 2013 Malibu Eco models.

Powerpack (module) part numbers 13286690, 13365402, 13394025 and 19117588 are on restriction through the GM TAC (Technical Assistance Center). If there is no high speed LAN communication or data cannot be accessed with GDS 2, a new power steering gear assembly will be needed.

The following DTCs are the only reason it would be necessary to replace an NJ1 Powerpack.

C0475 00 – Electric Power Steering Motor Circuit Fault

C056E 46 – Unrecoverable Software

TIP: These codes indicate that the Powerpack should be re-placed. It is suggested to use a wired TIS2Web connection when programming the new Powerpack.

For other DTCs, review the latest version of PIT5063A for additional diagnostic tips.

If it is necessary to replace the Powerpack, check the white tag on the black plastic cover of the Powerpack for a 4-digit code, 1 letter followed by 3 numbers (for example, E103). This code is necessary to order the correct replacement part. Contact GM TAC to confirm diagnosis and order a new Powerpack. One of the following part numbers will be needed:

E103 – 13286690

E121 – 13365402

E131 – 13394025

V102 – 19117588

Thanks to Christopher Crumb and Douglas Dombrowski

Tag on the Powerpack

8 August 2012

GM TechLink is published for all GM retail technicians and service consultants to provide timely information to help increase know-ledge about GM products and improve the performance of the service department.

Publisher:Diana Sancya GM Customer Care and Aftersales /Diana.Sancya@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: 3

1-248-729-4704

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

GM TechLink on the Web: : GM GlobalConnect

General Motors service tips are intended for use by professional technicians, not a “do-it-yourselfer.” T hey are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the information applies to your vehicle or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.Inclusion in this publication is not necessarily an endorsement of the individual or the company.

Copyright© 2012 General Motors All rights reserved.

IntelliBeam Testing

Instrument Panel Tweeter Noise

Questions have been raised about how to test the Intellibeam® High Beam Control system (RPO TQ5) on a 2007-12 Escalade during daylight hours. The only way to properly test the IntelliBeam system is at night time with the vehicle moving (Vehicle Speed Sensor input). The system uses a digital light sensor on the back of the rearview mirror. Covering the sensors on the mirror during daylight conditions will not work.

Service Information and the owner manual state that there are different sensitivity settings (Demonstration Mode) available for diagnostics. These reference materials indicate that this is done by pressing the

auto headlamp button (on the left side of the mirror) for 20 seconds until the Intel-liBeam indicator light flashes three times. The different sensitivity settings are not intended to aid in diagnosis. The settings are incorporated into the mirror to meet various government standards.

TIP: Using these different settings affect the performance of the mirror and should not be used.

If a customer accidentally enters this mode, the mirror will return to the normal factory setting after cycling the key.

Thanks to Scott Fibranz and Dave Thelen

A rattle noise in left side of the instrument panel may be heard on some 2012-2013 Corvettes. The noise may be caused by the tweeter not being secured to the tweeter grill. The curvature of the instrument panel causes the rattle to appear to be on the left side.

Remove the tweeter assembly from the instrument panel. Secure the tweeter in the grill by applying a small dot of hot melt adhesive on each of the three lock tabs. Only apply enough glue to fill each tab window. Reinstall the speaker assembly to the vehicle and confirm the repair.

Thanks to Jeremy Richardson

Apply adhesive on each of the three grill lock tabs.

No Crank, No Communication with GM LAN after ServiceAfter a service repair on a 2012 Escalade model, Avalanche, Silverado, Suburban, Tahoe, Sierra or Yukon model, that re-quired the X109 connector to be discon-nected, it may be found that the vehicle will not crank and there is no communica-tion on the GM LAN. This condition may be caused by the X109 connector being

plugged in backward. The connector has alignment ribs for proper orientation, but may still be installed backward.

Inspect X109 for proper orientation. Make sure the wire colors on both sides of the connector match.

Thanks to James Will

Service

Know-How

10212.08D 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 then Searchable Streaming Video to choose the current Emerging Issues seminar or past programs.

August 9, 2012

August 2012 9

Car Issues – Fix It Right the First Time

Truck Issues – Fix It Right the First Time

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

Information/Bulletin

2010 Terrain, Equinox — Detonation, spark knock and/or rattle noise on light acceleration, MIL On, DTC P0324 and/or P0326 set

If normal diagnosis for P0324 and/or P0326 do not correct the concern, the ECM should be reprogrammed with the latest calibration.

Replace the knock sensor. PI0325A

2011 Terrain, Equinox, Captiva — Harsh 2-3 shift Duplicate by accelerating at moderate throttle and then release the throttle before or during the 2-3 shift. Only reprogram with SPS software if condition is exhibited.

Repair or replace any transmission assembly hard parts.

PI0724A

2012-2013 Sierra, Silverado, Colorado, Canyon, Avalanche, Escalade, Escalade ESV, Escalade EXT — New design antenna mast

Use Loctite when replacing with new antenna.

Replace antenna because of thread concerns, noting that two different tread combinations could be available on new vehicles.

PI0741A

2007-2013 Yukon XL Denali, Yukon XL, Yukon Denali, Yukon, Tahoe, Suburban, Escalade ESV, Escalade — Third row seat(s) difficult to remove, install, release, tumble, fold, squeak noise

Perform functional verifications and perform repairs as outlined.

Replace seat assembly. 10-08-50-004B

2008-2013 Sierra, Yukon, Silverado, Tahoe, Escalade — Installation of electrical aftermarket accessories on 2-Mode Hybrid full-size trucks

Perform installation of approved accessories following procedures as outlined, ensure Brake Pedal Position sensor is calibrated, if equipped.

Install accessories that are not approved. Install approved accessories in any method other than specified.

09-08-45-003E

2007-2012 Yukon Denali, Yukon, Tahoe, Escalade — Rear door handle, latch, lock inoperative, binding, will not open, will not release intermittently

Perform repairs as outlined to adjust door handle release arm.

Replace door handle, lock assembly.

12-08-64-002

2011-2013 Escalade, Escalade ESV, Escalade EXT, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon, Yukon XL — One or more driver/passenger front seat power functions inoperative: recliner, lumbar support, fore/aft movement, heated and/or cooled.

Repair and reroute harness as instructed.

Replace seat recliner mechanism, lumbar mechanism, fore/aft mechanism, heat or cool module.

PI0601B

2011-2013 Escalade, Escalade ESV, Escalade EXT, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon, Yukon XL — Wax coating on frame peeling, metal shows corrosion/rusting

Perform repair as outlined. Replace frame. PI0564B

2011-2012 SRX — Heated seat(s) intermittently inoperative Check terminal connections at Memory Seat Module before replacing the heated seat element.

Replace the heated seat element pad without checking the Memory Seat Module terminals.

PI0742

Customer Care and Aftersales

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

Information/Bulletin

2010-2012 SRX, LaCrosse — Service Rear message displayed on Driver Information Center, DTC C0407 with Symptom Code 64 or C0403 with Symptom Code 62 set

Replace eLSD piston assembly or differential clutch oil filter

Replace eLSD clutch assembly, rear differential carrier assembly, or rear differential assembly

PI0703A

2012 CTS Coupe — Water leak/wind noise from passenger front door glass

Add a washer behind the upper rear jackscrew on the window regulator

Replace the door, window regulator or door glass

PI0748

2008-2013 CTS-V Sport Wagon, CTS-V Coupe, CTS-V, CTS Sport Wagon, CTS Coupe, CTS — Front floor console rear ashtray/bin door may not close

Repair the console rear ashtray/bin door assembly

Replace the console rear ashtray/bin door assembly

08-08-49-006A

2012-2013 Regal, Malibu, LaCrosse — Engineering Information - Engine no crank/no start due to discharged 12V battery

If the vehicle will not start, inspect the F23U BPIM BATT 7.5 Amp fuse. If it is open, call Engineering

Attempt to jump start the vehicle before checking the 7.5 Amp fuse

PIE0220

2012 Impala — Power steering hose design change Use new self-tapping mounting bolts listed in the PI

Use the old production bolts PI0750

2012-2013 SRX, Regal, Malibu, LaCrosse — Information on diagnosing intermittent electrical concerns with components fused through instrument panel fuse block

Check the terminal connections at the instrument panel fuse panel

Replace the instrument panel or body wire harness due to a loose fuse panel terminal. PI0745 covers the repair procedure for loose or over-sized terminals. Follow terminal repair procedure in PI0745 to tighten.

PI0745