The new Cruze is available with the 6-speed 6T40 automatic transmission(RPO MH8) that contributes to the car’sexcellent fuel economy while also providingresponsive performance.

One of the unique features about the auto-matic transmission is the adapt mode,which optimizes shift quality. As the vehi-cle is driven, the transmission will adaptthe shift patterns to best match the oper-ating characteristics of the vehicle.

It’s important to communicate to newCruze owners about how the automatictransmission operates. Owners may noticetransmission shifts will change for the firstfew hundred miles.

Transmission Control Module

Changing the six forward gear ratios is accomplished through the transmissioncontrol module (TCM) located inside the transmission. The TCM receives and moni-tors various electronic sensor inputs and

February 2011Volume 13, No.2

Adaptive 6-Speed Automatic Transmission . . .1

Recommended Techline Operating System:

Windows 7 Professional . . . . . . . . . . . . . . .1

New Electronic Pre-Delivery Inspection Form . .2

Timing the High Feature V6 Engine . . . . . . . .3

Volt Electric Vehicle Range Driving Tips . . . . . .4

Wind Noise or Water Leak at

Door Glass or Mirror Patch . . . . . . . . . . . . .5

Charge Port Door Operation in Cold Weather .5

Fuel Line/Bracket Rattle . . . . . . . . . . . . . . .6

Front Bumper Alignment . . . . . . . . . . . . . . .6

Accelerator Pedal Position Sensor DTCs . . . . .6

Inoperative Shift Indicator Light . . . . . . . . . . .6

Seat Belt Pretensioners . . . . . . . . . . . . . . . .7

Water Leak on Front Passenger Floor . . . . . .7

Service Know-How . . . . . . . . . . . . . . . . . . .7

Car Issues – Fix It Right the First Time . . . . . .8

Truck Issues – Fix It Right the First Time . . . . .9

Customer Care and Aftersales

Contents

continued on page 2

Recommended TechlineOperating System: Windows® 7 ProfessionalThe new recommended Techline operating system (OS) for dealership service department PCs is Windows® 7 Professional, 32 bit, and the recommended webbrowser is Internet Explorer (IE) 8. The minimum required systems are WindowsVista Business, 32 bit, and Internet Explorer 7. These guidelines for PCs as well asother IT infrastructure requirements can be found in the recently updated GM Dealership Infrastructure Guidelines.

TIP: As of January 1, 2011, GM Techline ended support of Windows XP and Internet Explorer 6. continued on page 2

Adaptive 6-SpeedAutomatic Transmission

uses this information to shift the trans-mission at the optimum time.

The TCM commands shift solenoids andvariable bleed pressure control sole-

noids to control shift timing andfeel. It also controls the applyand release of the torque converter clutch to allow theengine to deliver the maxi-mum fuel efficiency withoutsacrificing vehicle perform-ance.

Shift Quality

The purpose of the adapt functionis to automatically compensate the

shift quality for the various vehicleshift control systems. The adapt function

is a continuous process that will help tomaintain optimal shift quality throughoutthe life of the vehicle

TECHLINEnews

2 February 2011

Shifts within the automatic transmission are accomplishedby applying and disengaging clutches simultaneously,which provides a more direct feel, compared to “free-wheeling” gear change mechanisms.

The transmission uses a line pressure control system during upshifts to compensate for the normal wear oftransmission components. As the apply componentswithin the transmission wear or change over time, shifttime (the time required to apply a clutch) increases or decreases. In order to compensate for these changes, theTCM adjusts the pressure commands to the various pressure control (PC) solenoids to maintain the originallycalibrated shift timing.

This automatic adjusting process, referred to as "adaptivelearning," is used to ensure consistent shift feel as well asincrease transmission durability. The TCM monitors theinput speed sensor (ISS) and the output speed sensor(OSS) during commanded shifts to determine if a shift isoccurring too fast (harsh) or too slow (soft) and adjuststhe corresponding PC solenoid signal to maintain the setshift feel.

TIP: When the vehicle is new, with very few miles, the"adaptive learning" process has begun but is not yet complete. As the vehicle is driven, the learning processtakes place and the upshifts become more consistent andpleasing. In order to further the learning process, ownersshould drive the vehicle as they normally would. There isno need for special driving maneuvers to make the learn-ing occur.

Neutral Idle

The neutral idle feature of the automatic transmissionsaves on fuel by automatically shifting the vehicle into aneutral state when the vehicle comes to a stop and thebrake pedal is depressed. It shifts back to gear as thebrake pedal is released.

Neutral idle is activated when the brake pedal is de-pressed, and the vehicle speed, throttle position, andtransmission temperature are within the calibration defined limits. The TCM will command Neutral Idle ON.The low and reverse clutch remains applied. The TCM reduces the pressure command to the 1234 PC Solenoid5, which reduces the fluid pressure to the 1-2-3-4 clutch,allowing the clutch to slip. This reduces the torque converter clutch (TCC) slip speed, which, in turn, reducesthe engine load and lowers fuel consumption.

TIP: The driver may experience a different feeling during starts and stops when first driving the Cruze com-pared to other vehicles. The vehicle also may roll backvery slightly when stopped on an incline before shiftinginto Drive.

Thanks to Dave Peacy and Mike Johnston

Adaptive 6-Speed AutomaticTransmission –continued from page 1

The latest GM Dealership Infrastructure Guidelines are avail-able at www.gmdesolutions.com. (In Canada, look for the GMTechline IT Guidelines in the Service Library under Tools,Processes and Equipment on GlobalConnect.)

Refer to the guidelines for information on therecommended/required IT infrastructure, hardware and soft-ware for the general dealership and service department.

For more information, contact the Techline Customer SupportCenter at 1-800-828-6860 (English) or 1-800-503-3222(French).

Thanks to Lisa Scott

New Electronic Pre-Delivery Inspection Form

The Pre-Delivery Inspection Form has been revised for 2011. Thesechanges include:

• In the Under Hood section, the 12V battery testing procedure haschanged. The EL-50313 battery tester/charger (Midtronics GR8) isnow used in the PDI Mode and the print out is to be attached to theRepair Order.

• In the Final Inspection & Preparation section, the 12V battery isnow rechecked with the EL-50313 battery tester/charger as well.

For additional information please refer to Bulletin #03-06-03-004Dand Bulletin #02-06-04-015A.

Pre-Delivery Inspection forms are available through GM GlobalCon-nect under the Service Workbench on the Pre-Delivery InspectionForm link (in Canada, GM GlobalConnect under Library > Service> Vehicle Information).

Please discard any previous versions of the PDI Forms and print outnew forms as needed.

In addition, now featured at the top of the PDI Forms page is thePDI Form News section, which provides highlights of the latest PDInews.

Thanks to Mike Golinski

Be sure to use the latest form when performing a PDI.

TECHLINEnewscontinued from page 1

February 2011 3

The following models offer the availablehigh feature 3.6L V6 engine (RPO LY7,LLT), 2.8L V6 engine (RPO LP1) or 3.0LV6 engine (RPO LF1, LFW): 2007-2011CTS, SRX, STS, Acadia, Lacrosse, Allure(Canada only); 2007-2009 G6, AURA;2007-2010 OUTLOOK; 2008-2009 PontiacTorrent; 2008-2011 Enclave, Malibu, Equinox; 2008-2010 VUE; 2010-2011 Camaro; and 2011 Traverse.

The high feature V6 engine family featuresa camshaft drive system that consists of aprimary timing drive chain driven by thecrankshaft sprocket. The primary timingdrive chain drives two intermediate driveshaft sprockets. Each intermediate driveshaft sprocket drives separate secondarytiming drive chains, which drive the respec-tive cylinder head's intake and exhaustcamshaft position actuators.

The following supplemental informationmay be helpful when timing the high feature V6. Refer to #PIP4384E for addi-tional details and to the appropriate Service Information for complete timingprocedure information.

For additional information, view video10208.01D, January 2008 Emerging Issues, from the Common Training Website(U.S.). In Canada, view Tech Assist video16038.01W, Timing the High Feature 3.6LV6 Engine, on the LMS website and a related video on the GM GlobalConnectService Library under Technician Resources >TAC Talk Video Help.

Keep these items in mind before beginningthe timing procedure:

• In a front-wheel-drive vehicle, it may beeasier to remove the engine before beginning.

• When removing the front cover, be sure toremove the belt tensioner and all the bolts.Damage may occur to the block if this procedure is not followed.

• When removing the front cover, do not pryagainst or strike the cam actuators. Thiswill cause damage to the reluctor or actuator.

• Intake cam actuators have marks on themfor the Right Bank (R) and the Left Bank(L). They must be positioned respectively.

• Be sure to note the orientation of the in-jector wiring harness. The harness withconnector should come out on the frontside of the engine. If installed backwards itwill cause misfires and/or fuel trim DTCs.

• 4 screw Delphi and 5 screw Aisin cam actuators are interchangeable, but will require the correct shim behind them whenapplicable. 4 screw Delphi actuators use a

0.043 in. shim and the 5 screw Aisin actuators use a 0.063 in. shim.

Stage One Timing

To set the timing on a high feature V6 engine, start with the engine in stage oneposition with tool EN 46105-1, CamshaftLocking Tool, or EN 48383-1, CamshaftRetaining Tool, on the left bank, or bank 2.The circular timing marks on the camshaftsshould be aligned as shown.

Stage one primary chain alignment for thecrankshaft and the left intermediate gear isshown below. The intermediate gear has atriangular shaped timing mark that alignswith the painted link and the crankshafthas a dot-to-dot alignment.

The right intermediate gear has a triangu-lar mark that aligns with the painted link.

Remove EN 46105-1 or 48383-1 from theleft bank.

Stage Two Timing

The engine will need to be rotated 115 degrees clockwise for stage two timing.The crankshaft marks should align dot todot. Tool EN 46105-2 or EN 48383-2should fit easily on the rear of the cams onthe left bank of the engine.

EN 48383-3 should be installed on theright bank, or bank 1. The triangular marksshould be aligned.

The painted link on the right intermediateshaft should be aligned with the hole in therear gear.

The left camshafts will be aligned as shownwhen in stage two timing position.

If there are any concerns in identifying thecorrect location for the camshafts, checkthe number stamped in the rear of thecamshaft — RI is right intake, RE is rightexhaust, LI is left intake and LE is left exhaust.

Thanks to James Bloss

Timing the High Feature V6 Engine

The intermediate gear has a triangularshaped timing mark that aligns with the

painted link and the crankshaft has a dot-to-dot alignment.

In stage two position, the crankshaft marksshould align dot to dot.

The left camshafts will be aligned when instage two timing position.

In stage one position, the circular timingmarks on the camshafts should be aligned.

4 February 2011

Volt Electric Vehicle Range Driving TipsThe electric vehicle (EV) range displayedon the instrument cluster of the Volt is anestimate based on the recent driving conditions and driving history of the vehi-cle. It is normal for the displayed value tochange while the vehicle is driven. The displayed EV range can vary from seasonto season, week to week, day to day andeven drive to drive.

The electric range of the Volt may be lessthan customer expectations or what isbeing displayed on the in-vehicle displayfor EV range. The electric range of the Voltmay be higher or lower than expected dueto the driver’s technique, the outdoor temperature, and/or the terrain. In otherwords, driving and braking aggressively,driving in extreme outdoor temperatures,and/or driving in areas with large elevationchanges will impact the electric range capability.

FACTORS THAT AFFECT EV RANGE

Driver’s Technique• Jack-rabbit starts and driving aggres-

sively can drain the battery faster

• High-speed driving (over 75 mph/120km/h) will deplete the battery capacityand range quickly

• Increased weight from additional cargoor passengers can also decrease therange

Temperature

All electric vehicles are less efficient incold and hot conditions. This is a functionof battery storage capability and thegreater use of heating and air conditioningin these conditions.

In cooler temperatures, the electric cabinheater, electric air conditioning, and bat-tery heater may be running to defrost thewindows and heat the cabin. These itemscan have a substantial affect on range.

The actual range during periods of coldtemperatures will be at the low side ofrange estimates. This may become moreevident when a customer is driving formaximum fuel efficiency or when driving ona common route and the only variable isoutside temperature. It’s no different thanfuel mileage decreasing in a gas enginedue to cold temperatures, efficiencylosses, cold starts, cabin heating and theuse of the defrosters.

The average cost to fully charge the highvoltage battery is approximately $1.50 (depending on utility rates) and a customerwho is driving in cold temperatures may experience approximately 40-60 cents of

electrical energy use to condition the cabinand heat the battery.

TIP: In cold conditions below 25°F (-4°C), the engine may run periodicallyeven when the battery is charged to pro-vide supplemental cabin heat as well as toheat the high voltage battery. The ENGINERUNNING DUE TO TEMPERATURE message will be displayed in the Driver Information Center (DIC). Also, in hot temperatures, the electrically-driven airconditioning compressor will operate moreoften, using more energy.

TIP: Tire pressure, which can changealong with ambient temperatures, can havean impact on EV range. In order to maxi-mize EV range, ensure that the tires areproperly inflated. Tire pressure values canbe viewed through the DIC.

Terrain• Driving in hilly terrain will definitely im-

pact EV range

• Driving uphill requires more energy andcan reduce range

DRIVING TIPS FOR BETTERENERGY EFFICIENCY

Efficiency Gauge

Use the Efficiency Gauge (green/yellowspinning ball indicator gauge) on the Enhanced Configuration of the instrumentcluster to monitor efficient driving.

• Driving efficiently will keep the ballgreen and in the center of the gauge.

• Inefficient acceleration is indicated whenthe ball turns yellow and travels abovethe center of the gauge.

• Aggressive braking is indicated when theball turns yellow and travels below thecenter of the gauge.

Acceleration/Braking/Coasting• Avoid unnecessary rapid accelerations

and decelerations.

• Electric range is maximized at 50 mph(80 km/h) and below. Higher speeds usemore energy and can significantly reduceelectric range.

• Use cruise control when appropriate.

• Plan ahead for decelerations and coastwhenever possible. For example, do notrush to traffic signals.

• Do not shift to N (Neutral) to coast. Thevehicle recovers energy while coastingand braking in D (Drive) or L (Low).

TIP: A significantly different driving style(higher speed and acceleration rate, harderbraking, etc) compared to the previous

drive event (the last X miles of historyrecorded in the vehicle’s computer) willcause the actual driving range to be signifi-cantly less than the initially predicted electric range.

Drive Mode and PRNDLSelection• Use Normal Mode when possible.

• Sport Mode provides more responsiveacceleration than Normal Mode but canreduce efficiency.

• Use Mountain Mode prior to climbinglong, steep grades in mountainousareas. Be sure to engage MountainMode before entering mountainous terrain. Mountain Mode reduces electricrange and power but may be needed tomaintain speeds above 60 mph (96km/h) when climbing long grades of 5%or higher.

• Use L (Low) in heavy stop-and-go trafficor when traveling downhill. L (Low) re-quires less brake pedal application andprovides a controlled, efficient way toslow the vehicle.

Climate Settings• Using the heating and air conditioning

systems decreases the energy availablefor electric driving. Optimal energy effi-ciency is achieved with the heating, airconditioning, and fan turned off.

• Less energy is used at low climate con-trol fan speeds. When using the fan,FAN ONLY is the most energy efficientclimate setting. ECO is for moderate airconditioning and heating operation andis the next most energy efficient setting.COMFORT is the least energy efficientsetting.

• Use the auto heated seat feature instead of the climate settings. Heatingthe seat uses less energy than heatingthe vehicle interior.

• Use remote start to heat or cool the interior when the vehicle is plugged in toutilize electricity from the electrical outlet, maximizing the electric range.

• In hot weather, avoid parking in directsunlight or use sunshades inside the vehicle.

• Turn off the front and rear window defogger/defroster when they are nolonger needed.

• Avoid driving with the windows open athighway speeds.

Thanks to Paul Radzwilowicz, Keith Newbury and Tom Sklenar

February 2011 5

Wind Noise or Water Leak at Door Glass or Mirror PatchWind noise on some 2011 CTS Coupe and CTS-V Coupe modelsmay be heard at the driver’s or passenger’s door area, or at theoutside rearview mirror seal (mirror patch) area. Some vehiclesalso may have a water leak in these areas.

If a vehicle exhibits any of these conditions, there are two inspec-tion/repair procedures to follow. Refer to #PI0337 for completedetails.

Door Glass Fit

The wind noise or water leak at the door area may be due to thedoor glass not seating properly in the window seal. Checking thedoor glass can be done by applying masking tape at the front and

rear edges of thedoor glass andmeasuring how farthe glass seats inthe window seal. Ifthe measurementis greater than orequal to 3 mm(0.118 in.), the doorglass is seatingproperly (refer tothe information onthe mirror patcharea).

If the measurementis less than 3 mm(0.118 in.), push the

glass to the full upward position, and then leave the door closedfor 24 hours in a warm location. After the waiting period, openand close the door several times and measure the distance again.If the measurement is less than or equal to 3 mm (0.118 in.), increase the window tip-in toward the body seal. Adjust the regu-lator rail outboard to increase the window tip-in.

Mirror Patch

The wind noise at the outside rearview (OSRV) mirror patch area

may be the resultof a wind rush noisein certain drivingconditions.

Inspect the visibleedges of the frontvertical run channel(OSRV mirror seal)with the windowfully raised and thedoor closed. The entire length of theinterior and exteriorsealing surfaces ofthe seal should be incontact with the glass.

TIP: When inspecting the front run channel, ensure that thewindow is fully raised and not in the index position.

If the seal is notmaking completecontact, lower theglass and work theedges of the sealcloser together. Inextreme cases, theOSRV mirror sealmay need to be replaced.

Also, check for thepresence of frontand rear foamblocks inside themirror patch. If thefoam blocks are missing, install adhesive back shim stock foamtape as necessary.

Thanks to Jean Hart

Owners of the 2011 Volt may experience a frozen charge portdoor that will not open in cold weather. In addition, the Check Engine light may be illuminated and DTC P0CD2 (Charge PortDoor Unlock Control Performance) may be set.

In colder weather conditions, the charge port door may freezeshut due to snow and/or ice accumulating on the charge port dooror ice forming between the door and the seals.

Any snow and/or ice should be removed from the door prior to requesting the charge port door to be opened using either thecharge port door release button on the driver’s door or the Remote Keyless Entry transmitter (key fob). If the charge portdoor does not open in these conditions on the first release com-mand, lightly push on the outer charge port door surface to gently

break free any snowand/or ice, and then trythe release button again.

TIP: In colder weatherconditions, the chargedoor will open moreslowly than normal. Thisis due to the viscousdamper that's inside thecharge port housing.

DTC P0CD2 may set ifthe charge port door does not open during two consecutive keycycles. Erase the DTC, and then try the charge port door severaltimes to make sure the door opens correctly.

To help reduce the potential for moisture freezing between thedoor and seals, apply Krytox® weatherstrip lube to the chargeport weatherstrip seal. Refer to #PIC5415 for more information.

Thanks to Paul Radzwilowicz

Charge Port DoorOperation in Cold Weather

Check that the glass is fully seating in the door seal.

Inspect the front vertical run channel of theOSRV mirror seal.

Front (A) and rear (B) foam blocks shouldbe present inside the mirror patch.

6 February 2011

Fuel Line/Bracket Rattle

On some 2007-2011 Escalade models, Avalanche, Silverado, Suburban, Tahoe,Sierra, Sierra Denali, Yukon, Yukon Denali,Yukon XL, and Yukon Denali XL models, arattling noise during light accelerationaround 1,200-1,700 rpm may be noticed.The noise may also sound like a creak ortap sound coming from behind the instru-ment panel.

This noise condition may be caused by thefuel line or fuel line bracket above the trans-mission contacting the floor pan. Inspectthe fuel line/bracket and reposition awayfrom the floor pan.

Thanks to Jim Will

Front Bumper AlignmentA clunk or pop noise coming from the front end on some 2008-2011 Express and Savana vans — most noticeable while turning left or right at slow speeds while drivingup or down an incline — may be caused by the front bumper cover contacting thefender.

When inspecting for contact, make surethe vehicle is on a level surface, or placethe vehicle on a hoist. If using a hoist,keep in mind that a frame-supportinghoist will allow the body/frame to fluxand the contact area may be missed.

Also, a visual inspection of the left-to-right front bumper alignment may revealthe contact.

To correct this concern, perform aleft/right front bumper alignment.

Thanks to Jim Will

Inoperative ShiftIndicator LightThe upshift indicator light on the instrument cluster may be inoper-ative on some 2003-2007 ION; 2005-2010 Cobalt; 2006-2011HHR; 2007-2010 G5; and 2005-2006 Pontiac Pursuit (Canada only)models. The shift indicator will be able to be commanded On usinga scan tool.

The shift indicator is designed to function ONLY on vehiclesequipped with the 2.2L 4-cylinder engine (RPO L61) and a manualtransmission.

If the vehicle is equipped with engine RPO L61 and the shift indica-tor is inoperative, verify that the scan tool is up-to-date, and thencheck the BCM option configuration. If the automatic transmissionoption has an asterisk (*) next to it, remove it. Next, verify the restof the options before saving and exiting.

TIP: It is important to verify all options before saving and exitingthe BCM option configuration; otherwise, some of the options maydefault to On or Off and result in setting DTCs, warning lights or

the undesired functionality of other components. This should bedone even when the options are not changed.

Do not replace the BCM, ECM, or IPC for the inoperative shift indicator condition.

Thanks to Ernest Haller

A. GrillB. Upper bumper cover

C. Left front fender

Accelerator Pedal Position Sensor DTCsOn some 2007-2011 Escalade, Avalanche,Silverado, Suburban, Tahoe, Sierra andYukon models, an illuminated Service En-gine Soon light and Reduced Engine Powermessage may be the result of any of thefollowing APP Sensor DTCs being set:P2120, P2122, P2123, P2125, P2127,P2128, and/or P2138. In most cases, thiscondition is very intermittent, so it may bedifficult to get the DTC(s) to reset so step-by-step diagnosis can be performed.

If SI diagnosis does not isolate the cause ofthe DTC(s), inspect the related AcceleratorPedal Position (APP) sensor circuits for potential shorts-to-ground or high voltagedrop while manipulating the harness between the APP sensor and ECM. Also

inspect the related APP sensor circuits forpoor terminal tension at the APP sensorand ECM connectors using the correct terminal test probes.

If there are no problems found, inspectC109/X109 and C205/X205 for the following concerns:

• Connector halves that are not seatedproperly

• Corrosion and/or water intrusion

• APP circuit terminals that are not seatedproperly

• APP circuit terminals that have poor ter-minal tension using the correct terminaltest probes.

• APP circuit terminals that are notcrimped properly

C109/X109 is located on the left side ofthe engine compartment below the under-hood fuse block and C205/X205 is locatedunder the upper instrument trim panel.

If a terminal/wiring concern is found, repair it by following the related SI repairprocedure.

If these steps do not isolate the cause ofthis condition, re-crimp all of the APP circuitterminals at the APP sensor and ECM con-nectors using the proper terminal crimptools.

Thanks to James Parkhurst

February 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.comEditor:Lisa G. Scott

GM Customer Care and Aftersales /Lisa.G.Scott@GM.comTechnical Editor:Mark Spencer

/mspencer@gpworldwide.comProduction Manager:Marie Meredith

Desktop Publishing:5by5 Design LLC

/dkelly@5by5dzign.comFAX number: 3

1-248-729-4704

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.

Seat Belt PretensionersOn 2009-2011 Impala models, thefollowing codes may be set in the Sensingand Diagnostic Module (SDM):

B0015 – Left Front PretensionerDeployment Loop

B0022 – Right Front PretensionerDeployment Loop

B001A – Left Front PretensionerDeployment Loop

B001B – Right Front PretensionerDeployment Loop

Prior to the 2009 model year for theImpala, there was only one seat beltpretensioner for the driver and one seatbelt pretensioner for the front passenger.These pretensioners were built into theseat belt retractor.

At the beginning of the 2009 model year,the Impala was equipped with twopretensioners for the driver and twopretensioners for the front passenger.The first pretensioner is still attached tothe seat belt retractor. The secondpretensioner is attached to the anchor

point for the seat belt (located forward ofthe retractor). There is not a pretensionerattached to the seat belt buckle.

Following are the DTCs for eachpretensioner:

Thanks to Dave Eplin

ServiceKnow-How

10211.02D 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 currentEmerging Issues seminar or past programs.

February 10, 2011

Water Leak on FrontPassenger FloorWet carpeting on the front passenger-side interior floor of some 2010-2011LaCrosse models may be the result ofa water leak caused by a plugged orkinked HVAC evaporator drain tube. Insome cases, water from the HVAC system will drain back though theheater case and onto the carpeting.

Check for a plugged, misrouted, orkinked evaporator drain tube. The draintube may become blocked by any ofthese conditions. Clear any debris andreroute the drain tube as needed.

TIP: This vehicle does not use the traditional evaporator drain that is located on thecowl behind the engine. The drain tube runs down along the passenger-side floor panand exits the vehicle just ahead of the passenger seat.

Thanks to Matt Bierlein

Kinked evaporator drain tube

Driver’s seat beltretractorpretensioner

B0015 Symptomcodes 01, 02, 04,0D, 0E

Driver’s seat beltanchorpretensioner

B001A Symptomcodes 01, 02, 04,0D, 0E

Passenger’s seatbelt retractorpretensioner

B0022 Symptomcodes 01, 02, 04,0D, 0E

Passenger’s seatbelt anchorpretensioner

B001B Symptomcodes 01, 02, 04,0D, 0E

8 February 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 Volt – Rattle prevention measure ofinstalling foam tape to instrumentcluster

Add foam tape to instrument cluster Don’t install cluster without foamtape

PI0306

2006-2011 Aura, G6, Malibu – Unable to removefront seat mounting bolt

Attempt new cage nut clampingtechnique - see "Seat Removal Method# 1"

Don’t replace the floor panelreinforcement assembly

10-08-50-002A

2010-2011 Camaro – MIL illuminated, DTCP018B, P018C, P018D, P0231,P0232, P023F, P0641, P06A6, P069E,or P2635 set, intermittent hesitationor low power

Check the fuel pump control moduleconnector for loose fitting terminals

Don’t replace the fuel pump controlmodule

PI0311

2010 Corvette – OnStar antenna becomesloose/detached from windshield

Contact the WPC for a new bracketwith improved adhesive

Don’t replace the windshield orOnStar antenna, or reinstall usingtwo-sided tape

PI0099

2006-2010 STS – Front passenger airbag statusindicator displays OFF or switchesfrom ON to OFF With passenger inseat

Replace the Passenger PresenceSystem module. If the issues continueand the customer is light weight, waitfor an engineering solution

Don’t replace multiple parts trying tofix a condition for light weightcustomers

07-09-41-001B

2011 Volt – Perceived fluid leak at powersteering gear boot

Inform customer it is normal to be ableto see a small amount of grease aroundthe steering gear boot

Don’t replace the steering gear boot PI0314

2010-2011 Camaro – Noise from front seats Lubricate the seat track Don’t replace the seat frame 09-08-50-009B

2011 Volt – Volt in-field Quality AssessmentProgram (U.S. only)

Perform Quality Assessment per PI Don’t put more than 75 miles on thevehicle

PI0309A

2006-2011 Camaro, Sky, Solstice – Radio displayscreen scratches and scuffs

Polish the radio face plate Don’t replace the radio or the faceplate

09-08-44-015D

2011 Regal – Center console (ash tray)door will not open or stay closed

Relocate the harness behind the centerconsole door

Don’t replace the center consoleassembly

PI0317

2011 Cruze – Rattle noise under vehicle Remove the ID tags from the fuel railsunder the vehicle

Don’t replace components PI0336

2011 Cruze – Check Engine light ON, A/Cinoperative, DIC message: A/C OffDue to High Engine Temp

Replace the thermostat and update thecalibration

Don’t update the calibration only andrelease the vehicle

PI0326

2011 Cruze – DIC appearance and functionis different from the sales brochure,missing in owners manual

Show customer how to use the DIC Don’t replace the IP cluster PI0313

2011 Regal – Check Low Beam messagedisplayed on DIC

Update the BCM calibration Don’t replace the headlampassemblies, headlamp bulbs or theBCM

PI0322

2011 CTS, CTS-V – Wind noise at front sidedoor(s) and/or visible gap near top ofB-pillar or in mirror patch area

Follow both of the inspection/repairprocedures on the affected side(s)

Don’t replace parts PI0337

2008-2011 CTS, CTS-V, CTS Sport Wagon, CTS-V Sport Wagon – Updated GMnavigation radio map disc released toaddress some road names displayedas unknown and constant temperaturedisplay of 32°F (0°C)

Use this disc to update the database tocorrect roads that should be known butdisplay as unknown

Don’t replace the radio PI0338

2008-2011 CTS, CTS-V, CTS Sport Wagon, CTS-V Sport Wagon – XM Weatherinoperative or delay in receiving XMWeather and/or phone icon remainsdisplayed after completing OnStar orpersonal cell phone Bluetooth call

Update the radio software Don’t replace the radio PI0186B

2010-2011 CTS, CTS-V, CTS Sport Wagon, CTS-V Sport Wagon – Water spots onexterior surfaces

Wash the car, letting wash solutionsoak at least 5 minutes

Don't rub out or paint unless thewash procedure is not effective

PI0333

2003-2011 All Vehicles – Wheel alignmentspecifications, requirements andrecommendations for GM vehicles

Follow updated specifications,requirements and recommendations

Don’t use outdated specifications,requirements and recommendations

05-03-07-009C

2006-2011 All Vehicles – Non-GM parts andaccessories (Aftermarket)

Replace aftermarket serpentine beltwith OEM belt, or if an OEM belt is notavailable for the application, relocatethe TCM

Don’t replace the TCM 04-06-04-054B

February 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

2010-2011 Equinox, Terrain – Fluid leak from transfer case(PTU) vent

Replace the transfer case fluid Don’t replace the transfer case PI0312

2007-2011 Acadia, Enclave, OUTLOOK, Traverse – Gear oilodor in interior of vehicle

Add charcoal cabin filter Don’t replace any underhoodcomponents

10-01-37-002

2009-2010 Enclave – Rattle noise in exhaust system Add spot weld to exhaust tip Don’t replace the entire exhaustsystem

PI0308

2007-2011 Acadia, Enclave, OUTLOOK, Traverse – Mirror glasshas jerky operation or stops during mirror travel

Apply grease to the motor Don’t replace the mirrorassembly

10-08-64-003

2003-2009 Express, Savana – Revised rear axle lubricant filllevel

During scheduled maintenance,ensure that the rear axle lubricantlevel is filled to the bottom of thefill plug opening

Don’t leave the lubricant levelbelow the fill plug

PI0316

2007-2011 Avalanche, Envoy, Envoy XL, Envoy XUV, Sierra,Silverado, Suburban, Tahoe, Yukon, Yukon Denali,Yukon XL, Yukon XL Denali – Information on sidedoor body-mounted primary weatherstripreplacement

Follow proper diagnostics andperform appropriate primary dooropening seal repairs

Don’t replace the primary dooropening seals

09-08-64-012C

2000-2011 All Vehicles -- OnStar phone number concerns thatoccur during diagnosis of OnStar system

If the OnStar phone number isincorrect or tied to another vehicleand/or phone of some kind, followthe published repair procedure

Don’t replace the VehicleCommunication InterfaceModule (VCIM)

05-08-46-004C

2009-2011 Acadia, Enclave, OUTLOOK, Traverse – Poppingnoise when weight/pressure is applied to the centerrear of the front passenger seat cushion

Inspect and install new hog ringsto each rear location of thePassenger Presence System mat

Don’t replace the PassengerPresence System mat

PI0332

2009-2010 Canyon, Colorado, G5, Sierra, Silverado –Intermittent MIL/Check Engine light ON, DTCP0451 or P0454

Install fuel tank pressure sensorcover

Don’t replace the fuel tankpressure sensor

10-06-04-001C

2010 Avalanche, Escalade, Escalade ESV, Escalade EXT,Sierra, Silverado, Suburban, Tahoe, Yukon, YukonDenali, Yukon XL, Yukon XL Denali –Noise transientwith engine rpm (2100, 3100, 4100 rpm)

Install muffler band clamp Don’t replace rear axle drive linecomponents

PI0328

2011 Express, Savana, Sierra, Silverado – Exhaust leak ornoise at approximately 2500 rpm, fuel smell, oilysubstance on exhaust downpipe

Realign the exhaust Don’t replace the exhaust orexhaust manifold

PI0235A

2010-2011 Equinox, Terrain – Rear seat floor filler trim panelsloose/misaligned

Re-attach the 40 and 60 panels byaligning the integrated pivot barattachment tabs to the pivot barrod and snapping in place

Don’t replace the rear seat floorfiller trim panel assembly

PI0054A

2010 Acadia, Enclave, OUTLOOK, Traverse – Multipleaudio sources thumping or noise heard during DVDplayback

Reprogram the radio for customerconcern of multiple audio sourcesat the same time

Don’t replace the radio PI0107B

2010 H3 – Positive battery cable contacting engine sightshield

Reroute the positive battery cableaway for the engine cover

Don’t replace battery cablewithout checking condition first

PI0304

2007-2011 Sierra, Silverado – Mounting points for pickup boxaccessories

Mount accessories in correctlocation with acceptable loads

Overload or use cargomanagement point forattachment

09-08-66-011A

2011 Sierra, Silverado – Diesel Exhaust Fluid (DEF) fillinginstructions and general information

Add only 3.5 gallons of DEF at PDI Overfill 10-06-04-013

2010 Acadia, Enclave, Terrain – Whine noise heard whenusing OnStar or Bluetooth (install noise filter)

Verify concern occurs only whenusing OnStar or Bluetooth feature.Obtain the filter and install perinstructions

Replace the radio or VCIM forthis concern

10-08-44-005

2007-2009 Escalade, Escalade ESV, Escalade EXT Avalanche,Silverado 1500, Suburban, Tahoe Sierra 1500,Sierra Denali, Yukon, Yukon XL, Yukon Denali,Yukon Denali XL, G8 GT – Engine oil consumptionon aluminum block engines with Active FuelManagement (AFM)

Install AFM oil deflector and cleancarbon from cylinder

Perform repairs without doing anoil consumption test first

10-06-01-008A

2007-2011 Acadia, Enclave, OUTLOOK, Traverse – Front driverpower seat inoperative, driver seat will not moveforward/backward

Replace the motor drive cable Replace the seat adjusterassembly

07-08-50-013A

Customer Care and Aftersales