September 2012, Volume 14, No. 9

2013 Cadillac ATS 2013 Chevrolet Spark

The Fast and the Frugal

The all-new 2013 Cadillac ATS is offered in four models: a well-equipped standard model and Luxury, Performance and Premium Collections. The ATS features an all-new, lightweight, rear-wheel-drive architecture. At less than 3,400 pounds (1,542 kg), it has one of the lowest curb weights in the compact luxury sports sedan segment. All-wheel drive also is available. Various options and pack-ages include Cadillac CUE, the Bose® Cabin Surround audio system and a navigation system.

CUE Features

The ATS is offered with Cadillac CUE (with or without navigation). CUE (Cadillac User Experience) accommo-dates up to 10 Bluetooth-enabled mobile devices, USBs, SD cards and MP3 players. The eight-inch LCD multi-touch sensitive screen displays CUE’s home page, which re-sembles a smart phone screen.

In addition to CUE, the ATS is offered with other technolo-gies, including:

•Reconfigurable5.7-inch in-strument panel cluster display

•Full-colorreconfigurableHeads-UpDisplay.

•Keylessaccessandkeylesspush-buttonstart

The2013ChevroletSparkisthefirstGMentryinthegrowingmini-carmarket. Three models are available for the U.S. and Canadian markets — LS, 1LT, and 2LT.

The2013SparkutilizesGM’sGlobalAelectricalarchitecture,whichrequirestheuseoftheGlobalDiagnosticSystem2(GDS2)softwareand the Multi Diagnostic Interface (MDI) module. When using TIS2Web, the Spark is listed under Chevrolet-GMKorea.

Powertrain

The Spark is powered by a 1.2L 4-cylinder engine (RPOLLO).Thedual-overhead cam engine is installed transversely, and is available with either a 5-speed manual or 4-speed automatic transmission.

This compact inline 4-cylinder engine features Dual Continuous Variable Cam Phasing (DCVCP), electronically-controlled thermostat and low-fric-tion engine oil, with low maintenance, low emis-sions and outstanding fuel economy.

Contents

2013 Cadillac ATS . . . . . . . . . . . . . . . . . . . . . . . . . . 12013 Chevrolet Spark . . . . . . . . . . . . . . . . . . . . . . . 1Control Circuits and Test Lamps . . . . . . . . . . . . . . . 5Disabling Transport Mode . . . . . . . . . . . . . . . . . . . . 5Camaro 1LE and Dusk Special Edition . . . . . . . . . . 6FuelGaugeInoperative . . . . . . . . . . . . . . . . . . . . . . 7Dash Pad Appearance . . . . . . . . . . . . . . . . . . . . . . . 7West Coast Mirror Mounting Points . . . . . . . . . . . . 7AccessoryRemoteStartKits . . . . . . . . . . . . . . . . . 7FenderandFasciaAlignment . . . . . . . . . . . . . . . . . 8Sunroof Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Service Suspension System Message . . . . . . . . . . . 8A/C Blows Warm Air . . . . . . . . . . . . . . . . . . . . . . . 8Transmission Information Summary . . . . . . . . . . . . 9HVACFanOperatesonHighSpeedOnly . . . . . . . . 9Steering Wheel Air Bag Shorting Bar . . . . . . . . . . . 9CarIssues–FixItRighttheFirstTime . . . . . . . . . 10TruckIssues–FixItRighttheFirstTime . . . . . . . . 10Emerging Issues Seminar . . . . . . . . . . . . . . . . . . . 10

continued on page 2 continued on page 4

Cadillac CUE in the ATS

Customer Care and Aftersales

2 September 2012

Additional engine features include:

•Modularbalanceshaft system in the oil pan

•Low-frictionhydraulic roller-fingervalve operation

•Hydraulicten-sioner keeps the timing chain adjusted for life

•Rotocastalu-minum cylinder head with sodium-filledexhaust valves

To see more about the 2.0L turbo’s development, click here.

Theavailable3.6LV-6engine(RPOLFX)isthesamepowerfulandtechnologically advanced engine introduced in the 2012 CTS. It is rated at 321 horsepower (239 kW) and 275 lb.-ft. of torque (373 Nm). Like the 2.5L engine, the 3.6L V-6 is matched exclusively withtheHydra-Matic6L45six-speedautomatictransmissionwithtap-shift control.

6-Speed Manual Transmission

TheTremecM3LTR3160six-speedmanualtransmissionissimilarin design to the high-performance Tremec transmission found in the CTS-V series. The transmission features carbon synchroniz-ersforreducedshifteffort,hard-finishedgearsforgreaterrefine-ment and gear ratios tailored to the turbocharged engine’s broad torque band.

A mechanical limited-slip differential is standard with the six-speed manualtransmissionandincludedwiththeFE3sportsuspensionpackage.Itishousedinarobust8.6-inchcarrier.Othermodelsfeature a 7.67-inch carrier.

Click hereforengineandtransmissionspecifications.

Performance and Control

Supporting the ATS’s new suspension designs are advanced damp-ing,steeringandbrakingsystems,includingMagneticRideControl(MRC),whichistheheartoftheFE3SportSuspensionpackage.This package also includes a mechanical limited-slip differential, high-capacity cooling system and 18-inch summer-performance tires.MRCisareal-timedampingsystemthat“reads”theroadeverymillisecondandcanchangedampinginonlyfivemilliseconds.

AdjustablesettingsfortheFE3suspensionallowthedrivertoselectdifferentrangesofdampingforMagneticRideControl,including a competitive mode that also adjusts the intervention of the stability control and traction control systems.

The front multi-link MacPherson strut suspension uses a double-pivot design that incorporates a pair of ball joints and lower control links instead of a conventional wishbone at each wheel. A soft fore/aft ride link provides greater isolation from impacts and a stiff, laterally positioned handling link provides more direct steering feel and quicker lateral response.

Trio of Engines

The ATS offers three engine choices, including two new four-cylinders and Cadillac’s renowned 3.6L V-6. All of the engines feature direct injection and dual overhead camshafts with continuously variable valve timing.

Increasedefficiencyforthenewfour-cylinderswasachievedseveral ways:

• Lowerenginefriction,reduced16percent

• Variable-displacementoilpump

• Activelycontrolledthermostatwiththe2.5Lengine

Someoftheelementsthatcontributetotherefinementofbothfour-cylinder engines include:

•Balanceshaftsandintegratedoilpumplocatedinamoduleinthe oil pan, to reduce noise and vibration

•Strong,stiffforged-steelcrankshaftthatenablesquieterandsmoother engine operation at high rpm

• Inverted-toothchainsforthecamshaftandbalanceshaftfor quieter operation

•Uniquetwo-pieceoilpanwithanaluminumuppersectionthatprovides structural support and a stamped steel lower section that dampens noise

•Castaluminumbedplatewithcastironbearingcapinsertsto increase dynamic stiffness and reduce noise and vibration

•Structuralfrontenginecover,structuralcamcover,andlightweight composite acoustic intake manifold cover for sound attenuation

The2.5L4-cylinderengine(RPOLCV)isratedat202horse-power (151 kW) and 191 lb.-ft. of torque (259 Nm). It’s paired withtheHydra-Matic6L45six-speedautomatictransmissionwith tap-shift control.

The all-new 2.0L turbo 4-cylinder engine(RPOLTG)makesits debut in the ATS, advancing a legacy of high-perfor-mance turbo engines with greater efficiencyand more technol-ogy. Along with its 272 horsepower (203 kW), the 2.0T’s torque curve is broad and robust — delivering 90 percent of its peak 260 lb.-ft. of torque (353 Nm) from 1,700 rpm to 5,500 rpm — for immediate power at all speeds. At 135 hp/L, the new 2.0T is one of the most power-dense engines in theindustry.The2.0TisofferedwiththeHydra-Matic6L45six-speedautomaticortheTremecM3LTR3160manualtransmis-sion, a choice that’s unavailable in some luxury cars.

2013 ATS – continued from page 1

continued on page 3

2.5L 4-cylinder engine

2.0L turbo 4-cylinder engine

September 2012 3

2013 ATS – continued from page 2

The control arms, the spindle and the body form an effective four-bar link for each side of the front suspension. There is also a direct-acting stabilizer bar.

AttherearoftheATSisthefirstfive-linkindependentsuspensioninaCadillac.Fourhandlinglinks(upperandlowercontrolarms)are used at each side to control wheel motion and a toe link at each wheel provides additional horizontal control, particularly dur-ing hard cornering. The stiff links are mounted on a cradle made of steel with hydroformed side rails to help optimize the car’s struc-tural stiffness and mass.

All ATS models come with a premium electric, variable-assist powersteeringgearfromZFSteeringSystems.Thesteeringcolumn and intermediate shaft feature stiff, direct-acting and low-friction ball bearing designs for almost no lash in the entire steer-ing system.

An aluminum hood, magnesium engine mount brackets and light-weight,natural-fiberdoortrimpanelscontributetotheATS’slowoverallmass.Butsomeweightwasdeemednotonlybeneficial,but essential to the ATS’s driving experience. An example is the cast iron differential: Engineers found they could improve fuel economy with a cast iron differential rather than a lighter alumi-num version.

And while the rear suspension is mostly steel, the focus on load managementandstraightlinksenabledsignificantweightsavingswithout using alternate materials. This helps offset the weight of the engine and transmission at the front of the vehicle, helping the ATS deliver its 50/50 weight balance, while also contributing to lower noise and vibration. A similar approach was taken on the wheels, where extra structural aluminum was strategically added to further reduce vibration.

Four-wheeldiscbrakesarestandard on all models, with available Brembo performance brakes. They are matched with a four-channel ABS system that is integrated with stan-dard StabiliTrak stability con-trol and full-function traction control.

Seventeen-inch (17x8-inch) wheels with 225/40-series tires are standard and 18x8-inch wheels with 255/35-series rubber areofferedontheATS,withrun-flattires.ModelswiththeFE3 suspension feature 18x9-inch rear wheels.

Advancing Safety

The2013CadillacATS’ssafetystoryisbasedona“controlandalert”strategythatemploysadvancedtechnologies—includingradar — to help avoid crashes. Visual and audible alerts help driv-ers identify potential crash situations and even intervene when a crash threat appears more imminent.

Many of the advanced safety features are standard and others are offered in a pair of available Enhanced Safety System (ESS) packages,similartothesafetypackagesfoundonthenewXTS.They include the Safety Alert Seat, Lane Departure Warning, ForwardCollisionAlert,AutomaticCollisionPreparation,FrontandRearAutomaticBraking,AdaptiveCruiseControl,SideBlindZoneAlert,RearVisionCamerawithRearCrossTrafficAlert,AdaptiveForwardLighting,andIntellibeamheadlampcontrol.

To see the ATS development and results in action, click here and here.

Transport Mode

The ATS is being shipped with Transport Mode, which reduces the electrical load on the battery when the vehicle is parked to prolong battery stand time, turned on. When Transport Mode is enabled, the red battery indicator light on the instrument cluster will be flashing and the Driver Information Center will display a Transport ModeOnmessage.TurnoffTransportModebeforedeliveringthevehicle to the customer.

To turn off the Transport Mode:

1. Start the engine

2. Activate the hazard flashers

3. Press the brake pedal

4. Press and hold the Start/Stop button (if equipped) or turn the ignition key to the crank position for 15 seconds

Thanks to Jean Hart

The lightweight suspension and chassis components of the ATS offer excellent ride and handling.

Optional Brembo performance brakes

4 September 2012

2013 Spark – continued from page 1

The Spark has a manual drive belt ten-sioner as opposed to a self-adjusting one. The maintenance schedule calls for the drive belt tension to be inspected every 15,000 miles (24,000 km) and adjusted iftensionisoutofspecification.Thisisa new procedure and a special tool is needed to complete the inspection and adjustment.RefertoWaterPumpandGeneratorBeltTensionInspectionintheService Information.

Transmissions

Two transmissions are offered: a 5-speed manualtransmission(RPOMX2)anda4-speedautomatictransmission(RPOMNG).

The 5-speed transmission assembly uses synchromeshonthefiveforwardspeeds.The reverse speed gear is driven by sliding the idler gear without synchronizer.

TIP: The transmission features a reverse gear mis-shift mechanism that prevents the lever from being shifted directly from 5th to reverse. When shifting to reverse, be sure to shift from the neutral position.

The optional new four-speed automatic transmission is the Aisin AW 80-40LE Gen2,acompact,lightweight,electron-ically-controlledFF4-speedautomatictransaxlethatemploysaRavigneaux-typeplanetary gear. The transmission has a lightweight aluminum case.

Whenstoppedonahill,theHillStart Assist feature prevents the vehicle from rolling before driving off. During the transi-tion between when the driver releases the brakepedalandstartstoaccelerate,HillStart Assist holds the brake pressure for two seconds to ensure the vehicle doesn’t roll.

TIP: HillStartAssistwillnotoperateif StabiliTrak is disabled.

Unique Vehicle Characteristics

Transmission Shifts — The automatic transmission on the 2013 Spark has an adapt mode to optimize shift quality. Trans-mission shifts may improve over time for thefirstfewhundredmiles.Thisisnormal,as the transmission computer adjusts shift timing to optimize shift quality.

Steering Wheel Controls — The Spark does not have backlit steering wheel controls. Do not replace any components.

Folding Rear Seats — When raising the seatback, insert the safety belt latch plate into the hole on the side trim to en-sure that the safety belt does not cross the seatback locking mechanism.

Code Set Indicator — The Code Set indicator displays a number when the status of the vehicle has changed and action may be needed to correct the condi-tion.Followingarethevehiclemessagesindicated by each number:

Engine Oil Life System — The Engine OilLifeSystemshouldberesetto100%only following an oil change.

To reset the system:

1. Press the MENU button to view remaining oil life.

2. PresstheSET/CLRbuttonuntil100%isdisplayed.

License Plate Installation — Be sure to attach the license plate with all four screws to prevent a rattle noise concern.

Infotainment

Two infotainment systems — a base radio without a touch screen and an uplevel radio with a touch screen and Chevrolet MyLink — are offered on the 2013 Spark.

The uplevel radio with a touch screen fea-tures a home page that features access to audio sources, pictures and video, phone

features, a smart phone link to Pandora and Stitcher, and vehicle settings.

Special Tools

The following new tools have been released for the 2013 Chevrolet Spark:

Pre-Delivery Inspection (PDI)

Please be sure to review the PDI and CSDS forms published for this vehicle. There are several special inspection items highlighted for this vehicle. Additionally, the CSDS form has important customer educa-tion pieces that have been learned during ourCapturedTestFleetprocess.ReportanyproductissuesviaaFieldProductReport.

The Spark is shipped with Transport Mode enabled. This reduces the electrical load on the battery when the vehicle is parked to help prolong battery stand time. When the Transport Mode is enabled, the red battery indicator on the instrument cluster flashes.

To enable/disable the Transport Mode, start the engine, activate the hazard flash-ers, press the brake pedal, then turn the ignition key to the crank position for 15 seconds.

Foradditionalinformationaboutthe2013Spark, refer to #PI0760.

Thanks to Ashmi Haria

Code Set

Vehicle Message

10 BrakesOverheated

15 CheckHighMountedBrakeLamp

16 Check Brake Lamps

17 HeadlampLeveringMalfunction

18 LeftLowBeamFailure

20 RightLowBeamFailure

21 Check Left Position Lamp

22 CheckRightPositionLamp

23 ReversingLampFailure

24 LicensePlateLampFailure

25 LeftFrontTurnIndicatorFailure

26 LeftRearTurnIndicatorFailure

27 RightFrontTurnIndicatorFailure

28 RightRearTurnIndicatorFailure

56 PressureImbalance—Front

57 PressureImbalance—Rear

58 WinterTireRecognition

65 Theft Attempted

75 Service A/C System

81 Service Transmission

82 ChangeEngineOilSoon

89 Service Vehicle Soon

95 Service Airbag

Tool # Description

J-45747 FuelPumpLockRingRe-mover/Installer

J-35667-3 Cylinder Pressure Adapter

EN-50175 Crankshaft Locking Device

DT-47540 WheelHubReplacerAdapter

DT-47541 WheelBearingRemoverAdapter

DT-47542 Wheel Bearing Installer Adapter

DT-47543 Wheel Bearing Installer Adapter

J-21474-4 HexNut(long)

EN-46333 EngineOilPressureGaugeAdapter

EN-50171 Installer-CrankshaftRearSeal

EN-50172 Installer–CrankshaftFrontSeal

DT-50199 Installer – Bushing, Seal

DT-50955 OilPumpSealInstaller

CH-50164 FuelPressureGaugeAdapter

J-37105-C HubPuller

GE-50576 Acoustic Belt Tester

September 2012 5

Control Circuits and Test LampsA control circuit (output) from an electronic control module provides a logically con-trolled (by operator or software) voltage potential to a component or another elec-tronic control unit. This controlled voltage potential can be anything from vehicle ground to vehicle system voltage or a manipulated (pulsed/amplitude/frequency) voltage output.

The tool of choice to test a control circuit is a test lamp. When the control circuit is activated, the test lamp will load the circuit. If there is any resistance in the circuit the test lamp will not light.

Do Not Use a Digital Multimeter

Why a Digital Multimeter (DMM) voltage reading is not used to test control circuits:

•TheDMMdoesnotloadthecircuitbeingtested

•TheDMM’shighinputimpedance(typically10M ohms) would mask any resistive circuit condition up to 1M ohm.

•TherearealsotimeswhentheDMMvolt-age reading will not toggle or change states when commanding the control circuit on andoff.Thisiscausedbyinternalfilteringin the control module, holding a charge (voltage) on the control circuit.

Test Lamps

There have been two essential test lamps used over the years.

•Original–Lowimpedance(20Ω) test lamp J-34142-B

•Newer–Highimpedance(200Ω) test lamp J-35616–210

EithertestlampworksfinewhentestingaB+ (Battery Positive Voltage) or an ignition circuit. And up until the 2005 model year, bothtestlampsworkfinetestinganycon-trol circuit.

However,whentestinga2006modelyearand newer control module control circuit, the newer high impedance test lamp (J-35616–210) must be used in place of the original low impedance test lamp (J-34142-B).

The issue is not with the test lamp but with the newer control modules. The original low impedance test lamp (J-34142-B) requiresahighinrushcurrenttofireoffthe bulb. When this happens, the control module shuts down the output driver. It’s not because the output driver can’t handle the temporary current spike (up to half an amp), but because the control module’s software is calibrated to turn off the output

driver at a very low current threshold and in a very short amount of time (typically, only a few milliseconds).

Because the on-vehicle diagnostic valida-tion is done using the newer test lamp (J-35616–210), it’s important for techni-cians to also use it when testing control circuits.

The following note is being added to the Service Information diagnostic procedures whereithasbeenidentifiedthatthenewertest lamp (J-35616-210) must be used.

Note: ThissteprequiresusingaGMapproved test lamp (J-35616–210) or equivalent.Failuretodosomayresultinamisdiagnosis of the control module. Using a low impedance test lamp can cause the control module to temporarily shut down and not light the test lamp.

There are some control module outputs that will not work even with the newer test lamp (J-35616–210). In these cases, the control circuit test steps in the Service Informa-tion call out alternative diagnostic testing methods.

Thanks to Dave Nowak

Disabling Transport ModeTransport Mode is a relatively new feature that reduces the electrical load on the battery when the vehicle is parked, which prolongs the battery stand time. This feature is used on vehicles being shipped outside of the United States and Canada, includ-ing2010-2013SRX,Camaro;2011-2013Cruze,Volt;2012-2013Verano,Orlando(Canada),Sonic;2013ATSandSpark.Forthe2013 model year, some models will be shipped from the assembly plant with the Transport Mode on.

When Transport Mode is enabled, the red battery indicator light on the instrument cluster will be flash-ing and the Driver Information Center (if equipped) will display a Transport ModeOnmessage.

When Transport Modeisonandthevehicleisnotrunning,theRemoteKeylessEntry(RKE)transmitter(keyfob)isdisabledandthecontenttheft deterrent and exit lighting timers are reduced. When Trans-port Mode is on and the vehicle is running, there is no difference in operation.

Transport Mode may be left on while the vehicle is in dealer inventory. The method to turn the mode off is the same as to turn the mode on.

2011-2013 Vehicle Procedure

ToturntheTransportModeOn/Off:

1. Start the engine

2. Activate the hazard flashers

3. Press the brake pedal

4. Press and hold the Start/Stop button (if equipped) or turn the ignition key to the crank position for 15 seconds

2010 Camaro Procedure

ToturntheTransportModeOn/Off:

1. Activate the hazard flashers

2. Turn and hold the ignition key in the crank position for 15 seconds.TheTransportModeOffmessagewillbedisplayed.

2010 SRX Procedure

ToturntheTransportModeOn/Off:

1. Press the brake pedal

2. Push and hold the Start/Stop button for 15 seconds or until the TransportModeOffmessageisdisplayed.

ForSRX,ifTransportModeisactive,theRKEsystemwillonlyworkwhentheignitionisOnortheBCMisawake(approximatelyfor 20 minutes after the ignition is turned off).

Thanks to James Parkhurst

Transport Mode On message

6 September 2012

Camaro 1LE and Dusk Special Edition Splitter Installation and Hood Graphic WarrantyTwo new looks for the 2013 Camaro are now available — the 1LE performance package and the Dusk Special Edition package.

1LE Performance Package

The 1LE performance package is offered on 1SS and 2SS coupe modelswithaTremecTR6060-MM6six-speedmanualtransmis-sion. It features monotube rear dampers, larger front and rear stabilizer bars, a strut tower brace, 20-inch aluminum wheels, ZL1 wheel bearings, toe links and rear shock mounts and a ZL1 high-capacity fuel pump.

Visually, the 1LE package is distinguished by its matte black hood, front splitter and rear spoiler. The functional front splitter and rear spoiler contribute to the car’s on-track performance by helping to reduce aerody-namic lift at high speeds.

Dusk Special Edition

The Dusk Special Edition package is available on 2LT and 2SS mod-els. It includes several unique exterior and interior features, including Blue RayMetallicpaint, a front splitter and rockers and 21-inch alumi-num wheels.

Splitter Installation

Splitter installation on 1LE and Dusk Special Edi-tion models is performed at the dealership. The package includes the splitter, three brackets, fas-teners and a template. The fascia is not removed from the vehicle during split-ter installation.

The procedure calls for installing the center bracket and the two corner brackets that support the splitter.

The splitter slides onto the brackets and is secured with rivets at the rear and front of the splitter from below the vehicle. All 29 rivets must be installed for the splitter to remain properly secured to the vehicle.

TIP: After splitter installation, the ground clearance of the Camaro is lower, similar to a Corvette Z06. Use caution when approaching curbs to avoid damage.

The splitter installation instructions are included with the com-ponents in the vehicle. The instructions also can be found in the Service Information. Additional time has been added to PDI to account for splitter installation.

Hood Graphic Warranty

The 1LE package features a matte black hood graphic manufac-tured and warranted by 3M. To maintain the appearance of the graphic, hand washing or a touchless car wash is recommended.

TIP: DONOTpolishorwaxthegraphic.Usingpolish,waxorany solvent-containing products will discolor the graphic.

Ownersaredirectedtocontacttheirdealerforanywarrantyclaims. The warranty form is included in the glove box. Dealers are to arrange an assessment of the claim with 3M.

ForadditionalinformationaboutvehiclegraphicsavailableonChevrolet models, visit www.chevroletgraphics.com.

Thanks to Brad Thacher

Camaro 1LE

Center bracket and corner brackets installed.

Secure the splitter from below the vehicle.

Use rivets at the front and rear of the splitter.

1LE package splitter

September 2012 7

Accessory Remote Start Kits

Fuel Gauge Inoperative

Dash Pad Appearance

When installing an accessory remote start kit on a 2010-2013 Equinox or Terrain, the correct kit part number must be used.

Since changes have been made to the Equinox and Terrain, there are three kit part numbers.

MY 2010/11 Kit 20981996 – in-cludes latch PN 20941413. This kit should only be used for model years 2010/11.

MY 2012 Kit 22924978 – includes latch PN 22787039. This kit should only be used for model year 2012 and not for model year 2013.

MY 2013 Kit 22957875 – includes latch PN 22909711. This is the only kit to date for model year 2013. This kit will be ready for sale in the near future.

Prior to the required programming event, Techline Customer Support Center agents will verify the compat-ibility of the kit part number and model year.

Thanks to Ann Briedis

The fuel gauge may be inoperative and stuck on empty (E) with a full tank of fuel on a 2012 Sonic. DTCP0461(FuelLevelSensorPerformance)maybeset in the ECM. After clearing the DTC, the gauge will begin to read correctly.

Before replacing any parts, verify the condition is not being induced by the owner frequently topping offthefueltankoroverfillingthefueltankpasttheautomatic shut-off of the gasoline pump. The fuel tanklevelsensoriscalibratedtoaspecificlevelinthefuel tank for the full mark. While driving the vehicle, the ECM performs a calculation based on mileage and fuel use. If the vehicle does not use the proper amount of fuel in the given mileage, DTC P0461 may set and cause the fuel gauge to become inoperative.

Explaintoownerstheimportanceofnotoverfillingthefueltankorrefillingtoofrequentlyandadvisethatwhenthegaspumpstops,thefueltankisfilledtoitscalibrated capacity.

Thanks to Bryan Brunner

The dash pad area surrounding the radio center stack on some 2012-2013 Camaros may appear to be deformed or wrinkled. This area may be slightly to the left or right of the center stack, or directly above it.

The trim piece does not appear like this when the car was new. The service replacement trim piece may be similar in appearance when it is removed from the packaging.Orifthe trim piece has been replaced and exposed to direct sunlight for some time, the condition may reoccur.

Engineering is aware of this parts issue and it is cur-rently under inves-tigation.DONOTreplace the trim pad at this time.

Thanks to Matt Bierlein

West Coast Mirror Mounting Points2007-2010 SilveradoHD2500/3500 andSierraHD2500/3500 models equipped withSEOWestCoast-style mir-rors(RPODG5,9F7,9N8)mayexperience sheet metal cracking around the mirror mounting points.

Repairthesheetmetal following body repair best practices and install the mirror bracket reinforce-ment kit, P/N 22760911, using the bolts, nuts, and nut-certs supplied.

Thanks to Scott Fibranz

Dash pad surrounding the radio center stack

Cracked door sheet metal

West Coast mirror installed with reinforcement kit

8 September 2012

Sunroof Noise Service Suspension System Message

Fender and Fascia Alignment

A/C Blows Warm Air

After opening the sunroof to the fully open or fully closed position, there may be a grinding or ratcheting noise and/or the motor may continue to run on some 2007-2010 Cobalt andG5models.Thesunroofmotorand/ormodule (frame) may have been replaced with no change in the condition. In some cases, theconditionmayhavebeenfirstnoticedafter a motor or sunroof replacement.

Removethesunroofmotorandinspectitfor a missing clip as shown in the illustra-tion. The clip may have fallen off the motor and needs to be reinstalled. Also inspect the gear on the motor and the cables on the sunroofframefordamageorwear.Replacethe affected component if excessive wear isfoundandreinstalltheclip.RefertotheSunroofMotor/ActuatorReplacementandSunroof Actuator Motor Synchronization in the appropriate Service Information for removal and installation of the motor.

Thanks to Ernest Haller

A Service Suspension System message may display on the Driver Information Centerofsome2010-2012LaCrosseand2011-2012Regalmodels.DTCsB1370 sym 01, C0575, C0580, C0595, C0600, C0670, C0675 and/or C0870 with the symptom codes sym02, 05 or 0A may be set.

It may be found that the harness to either the left front or right front accelera-tion sensors and/or damper actuators may be rubbing on the drive axle or any of the front suspension components. Circuits may also become open due to flexing of the harness at the knuckle attaching clip.

Inthesecases,replacethefrontwheelspeedsensorharnessatX113fortheleftsideandX114fortherightsideoftheLaCrosseandX131fortheleftsideandX141fortherightsideoftheRegal.Routethenewharnesstopreventfurther contact from occurring. The new harness will be shorter as it no longer attaches at the steering knuckle.

Thanks to Christopher Crumb

Onsome2013Malibus, the front fascia may not be completely snapped into the fender bracket. This condition may be caused by a disengaged standoff of the front fender align-ment bracket and fascia.

To align the fender and fascia:

1. Openthetopnotch of the fascia to allow more clearance for the tab of the black bracket.

Onsome2013Sparks,theairconditioningmayonlyblowwarmairormayget slightly cooler during acceleration. During diagnosis, the A/C pres-sures may be erratic and the low side may be as low as 0 psi to 30 inches of vacuum.

Inspect for metal contamination in the A/C system by removing the plug from thebottomofthereceiver/drierandcheckingfordebrisinthefilterassembly.Alsocheckfordebrisorcontaminationinthethermalexpansionvalve(TXV).If contamination is found, perform repairs as outlined in the appropriate Ser-vice Information and verify repairs.

Thanks to Bryan Brunner

Open the top notch of the fascia. Trim the standoff

2. Trim the standoff down almost flush with the black bracket.

3.Reassemblethefascia.

Thanks to Christopher Crumb

Verify the sunroof motor clip is present.

Standoff trimmed down almost flush with the bracket.

September 2012 9

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

GM TechLink on the Web: : GM GlobalConnect

General Motors service tips are intended for use by professional technicians, not a “do­it­yourselfer.” 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 know­how 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.

HVAC Blower Fan Operates on High Speed OnlyThe HVAC blower motor may only operate on high speed and be inoperative on all other speeds on a 2012 Sonic. This condi­tion may be noticed after the vehicle was jump­started. The thermal fuse in the blower motor resistor may be open.

Follow the diagnostics in the appropriate Service Information and use the following values to determine if the blower resistor thermal fuse is open.

Terminal C is the common, so the circuit is:

C with A = 1.34 Ohm +/­15%

C with B = 0.45 Ohm +/­15%

C with D = 0.012 Ohm +/­15%

C with E = 2.60 Ohm +/­15%

Using a DVOM, place it on the ohms set­ting. If the resistance values are “0,” the

fuse is open and the resistor needs to be replaced. If correct resistance values are seen, then the resistor is OK for use and further diagnostics will be required to iso­late the source of the condition.

If the thermal fuse is found to be open and there are no other faults found that would cause the thermal fuse to open, the condi­tion may have been caused by leaving the blower motor on while performing a jump start. Instruct owners to follow the Owner Manual instructions when performing a jump start.

TIP: Turn off or unplug all accessories on either vehicle during the jump starting procedure to prevent possible damage to the accessories.

Thanks to Bryan Brunner

Steering Wheel Air Bag Shorting Bar

Transmission Information Summary

On some 2012 Cruze and Verano models built before June 21, 2012, the Air Bag/SIR light may be illuminated and DTCs B0012 and/or B0013, symptom byte 0E, may be stored in the Inflatable Re­straint Sensing and Diagnostic Module (SDM). This condition may be caused by a damaged shorting bar in the steering wheel inflatable restraint module (steer­ing wheel air bag).

This condition often is intermittent. Replacing the X85 Steering Wheel Air

Bag Coil will not resolve the issue.

Wiggling the connectors at the F107 Steering Wheel Inflator Module may or may not cause the DTCs to set.

Follow the normal diagnostic proce­dures in the Service Information for these DTCs. If normal diagnosis does not identify the cause of the condition, replace the steering wheel inflatable re­straint module (steering wheel air bag).

Thanks to Christopher Hightower

A summary of important transmission­related bulletins and Preliminary Information (PI) has been recently released to help build awareness of the latest transmission information available. The list provides a convenient resource for transmission techni­cians when performing transmission repairs.

The transmission information summary is attached to this issue of TechLink. It can be printed for easy reference.

Prior to beginning any repairs, it’s critical to always follow Strategy­Based Diagnostics and check the appropriate Service Information for any bulletins or PIs that may apply.

In addition, go to www.gmtraining.com to learn more about the transmission train­ing classes that are available in your area and online. In Canada, refer to the course catalog at www.gmprocanada.com.

Thanks to Mike Johnston

10 September 2012

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

2007-2011 Escalade,EscaladeEXT,EscaladeESV,Avalanche,Suburban,Tahoe,Yukon,YukonXL–Windshieldwiper chatter/noise and/or streaking

Clean or replace blade with new design P/N 22793882.

Use P/N 15214346. 11-08-43-001

2010-2011 Terrain,Equinox–Outboardside(s)ofrearseatcushion trim cover loose/detached

Repairtherearseatcoverwithclips from the recently released seat retainer kit.

Replacetherearseatcover. PI0365A

2011-2013 Terrain,Equinox–Replacementprocedureforcarpeted floor mat retainers

Repairthefrontcarpetedfloormatwith parts from the new floor mat retainer kit.

Replacethefrontcarpetedfloormats.

PI0763

2012-2013 Terrain,Equinox–ErraticorinsufficientcoolingwhenA/CcompressorisOn

RepositiontheA/Ccompressorand re-torque the mounting bolts.

ReplacetheA/Ccompressor. PI0767

2012 Sierra,YukonXL,Yukon,Tahoe,Suburban,Silverado,EscaladeEXT,EscaladeESV,Escalade,Avalanche–Frontpassengerseatrattlewhenunoccupied-lumbarguide rods contacting the upper seat back frame

Install zip tie to guide rods. Replaceanyseatcomponents. PI0761

2007-2013 Suburban,YukonXL–Informationonnormalcondition of suspension light contact points - pitman arm, frame, lower control arm, caliper bracket bolt, steering knuckle

Confirmthesearenormalcontactpoints per bulletin.

Modify any components or attempt to make any repairs to correct the light contact condition.

PI0764

2006-2012 Express,Savana–Frontshockabsorbertowerseparating from frame

Add reinforcement. Replacetheframe. PI0489A

Customer Care and Aftersales

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

Information/Bulletin

2012 Cruze – Cruze all-weather floor mat retainer broken Replacefloormatretainer. Replacefloormats. PI0769

2013 ATS, Malibu – Engine Exchange Program for 2013 modelyear(GMNAOnly)

Exchange engine assembly, refer to bulletin for the list of parts that can be replaced.

Disassemble major components.

PI0768A

2009-2011 Terrain,HHR,Equinox,Cruze,Camaro,SRX,CTS-VSport Wagon, CTS-V Coupe, CTS-V, CTS Coupe, CTSSportWagon,CTS,Regal,LaCrosse–Clicking-type noise from front or rear of vehicle when shifting betweenReverseandDriveoronhardacceleration

Add washers to front axle. Replacefrontaxle. 09-04-95-001D

2013 Spark–SparkNewModelFeaturesandServiceGuide

Take vehicle out of Transport Mode as part of PDI per Bulletin 11-08-49-001.

Leave the 12V battery light flashing.

PI0760

2013 Spark – Information on clicking/ticking sound/noise heard inside vehicle when engine is warm

Verify noise is as described in bulletin. Do any repairs for this noise. It is considered normal.

PI0772

2011-2012 Cruze – Coolant leak at water pump Replacethewaterpump,gasketandthermostat.

Replacethewaterpumpbolts. Leak at the bolts is fixedwithnewgasket.

PI0762A

2009-2013 Terrain,Outlook,Acadia,Impala,Equinox,Camaro,Traverse,Terrain,SRX,STS,CTS,LaCrosse–Information on clicking/ticking sound/noise heard during cold start

Inform the customer that this is normal operation of the high pressure fuel pump and injectors.

Replacehighpressureinjection pump for ticking noise.

07-06-04-025H

2010-2013 XTS,Spark,Sonic,Orlando,VOLT,Cruze,Camaro,SRX,Verano,Regal–TransportModeOnmessagedisplayed in Driver Information Center and/or battery light is flashing

Verify involved vehicles do not have TransportModeOnwhencheckingfora complaint of key fob inoperative.

Replacekeyfoborreceiversfor inoperative condition if Transport Mode is active.

11-08-49-001B

Service

Know-How

10212.09D Emerging Issues

To view Emerging Issues seminars:Logintowww.gmtraining.com,selectServiceKnow-How/ TECHAssistfromthemenu,selectEmergingIssues,andthenSearchable Streaming Video to choose the current Emerging Issues seminar or past programs.

September 13, 2012

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