October 2013, Volume 15, No. 10 The redesigned 2014 Malibu features fuel-saving stop/start technology as standard equipment on the base model with the 2.5L four-cylinder engine. The stop/start system contributes to a 14% improvement in city fuel economy on the 2.5L model, compared to the 2013 model. 2014 Malibu Stop/Start System TECHLINEnews Take the Annual Service Technician Survey The 2013 Service Technician Survey is taking place now and you re encouraged to voice your opinion. To participate in the survey, go to www.gmtechsurvey.com. The survey is for U.S. dealerships. Over 11,000 technicians from 17 Original Equipment Manufacturers (OEM) completed the industry-wide survey in 2012. The purpose of the survey is to collect feedback on dealership service trends, technician satisfaction, and dealership operational challenges as well as gain a better understanding about whether technicians receive the appropriate level of support from GM and their dealership. As a result of feedback from the 2012 survey, the GM Service Technical College (STC) has opened two new satellite training centers to address the preference for more hands-on training classes. In addition, a need for more timely responses by the Technical Assistance Center has continued on page 2 The Stop/Start System is automatically activated each time the ignition switch is turned on. No driver interaction is required. Stop/Start Operation Stop/start technology helps conserve fuel by automatically shutting off the engine when the car comes to a stop (referred to as an Auto Stop), such as at stoplights, as well as reduce overall tailpipe emissions. The engine automatically restarts (an Auto Start) in approximately 400 milliseconds when the driver releases the brake, depresses the accelerator pedal, or moves the shift lever out of the Drive position. A stop/start event occurs based on inputs to the ECM. A battery sensor module Contents continued on page 2 2014 Malibu Stop/Start System.... 1 Annual Service Technician Survey.... 1 Insufficient Cooling when the A/C Compressor is On.... 3 Water Leak into Rear Floor.... 3 Inspect Ignition Coil Grounds... 4 Excessive Dust in the Cabin... 4 Sunroof Reverses after Contacting Air Deflector.. 4 HMI Module Damage........................4 Front Seat Cushion Movement.... 5 Outside Temperature Display Will Not Update.... 5 New Chassis Control Module Name.... 6 Unwanted Trunk Opening.... 6 Tailgate Hinge Lubrication.... 6 Blank Radio Display.... 7 Front Brake Rotor Cooling Rings.... 7 New Axle Lubricants.... 7 Car Issues Fix It Right the First Time.... 8 Truck Issues Fix It Right the First Time.... 9 Service Know-How... 9 Customer Care and Aftersales
2014 Malibu Stop/Start System continued from page 1 connected to the primary 12V battery continually monitors the battery charging current, voltage, state of charge, state of function and state of health, and sends this information to the BCM. The BCM communicates the voltage and current information with the ECM, which is used to determine if the battery state of charge, as calculated in the ECM by the Battery State Estimation (BSE) system, is sufficient to support a stop/start event. The ECM has access to independent sensing systems to verify the information received from the battery sensor module via the BCM is correct, including an analog current sensor wired directly to the ECM and battery voltage sensing via the Run/Crank input to the ECM. To support the increased number of engine starts, the starter motor is upgraded with a high performance electric motor and a stronger pinion engagement mechanism with reduced noise levels. During Auto Stops, an auxiliary 12V battery, located in the trunk, powers electric accessories such as the heating and air conditioning blower, power windows and the radio. The A/C compressor is belt driven, so the compressor does not run when in Auto Stop mode. TIP: The auxiliary 12V battery also needs to be disconnected to turn off all 12V power when required during service. Auto Stop Criteria During an Auto Stop, the tachometer needle will rest at the Auto Stop indicator (500 RPM point). The ECM will enter an Auto Stop event only if all of the following enabling criteria have been met. Vehicle speed during drive cycle was greater than 2 MPH (3 km/h) Ambient and engine coolant temperature correlation meets specified values Ambient and transmission fluid temperature correlation meets specified values Hood switch status is closed Brake pedal is depressed beyond a specific value (approximately. 30%) Accelerator pedal is in the learned home position Brake booster vacuum is greater than 45 kpa (7 PSI) Transmission gear selector is in the Drive position Vehicle speed is less than 3 MPH (5 km/h) Engine speed is below 1500 RPM Engine coolant temperature is less than 248 F (120 C) No A/C compressor request from HVAC system (A/C or Defrost modes) Battery voltage is greater than 12V Auto Stop indicator Battery state of charge is greater than 75% (changes with state of health) When the Stop/Start System has shut down the engine, and the ambient temperature is below 59 F (15 C), the ECM will activate the stop/start auxiliary relay, which controls the electric engine coolant cabin heater pump motor to continually circulate the engine coolant through the engine and heater core while the engine is off. This ensures the engine and passenger compartment temperature is maintained while the engine is off. Once the engine has been restarted, the ECM turns off the electric coolant pump motor and the engine s internal coolant pump circulates the engine coolant. Auto Start Criteria The ECM will perform an Auto Start if any of the following conditions are true. Conditions that will enable an Auto Start: Transmission gear selector is moved from the Drive position Driver removes pressure from the brake pedal or depresses the accelerator pedal while the vehicle is in the forward Drive gear An HVAC function is selected that requires the A/C compressor System-enabled conditions that will enable an Auto Start: Brake booster vacuum is less than 40 kpa (7 PSI) Vehicle speed is greater than 4 MPH (10 km/h) HVAC inside air temperature changes greater than 5 F (3 C) (with Automatic HVAC) A/C compressor request from the HVAC system (A/C or Defrost modes) Battery voltage is less than 11V Battery state of charge is less than 73% (changes with state of health) Hood switch status changes to open Auto Stop time exceeded 5 minutes continued on page 3 TECHLINEnews Take the Annual Service Technician Survey been addressed by an improved escalation process to resolve issues in less time. TIP: All survey responses are strictly confidential and will not be shared with your dealership. To complete the 2013 survey, you will need to answer the following questions before beginning the survey: OEM and Title/Position Technician Training ID Dealer Code/BAC Code The survey should take approximately 15 minutes to complete. Please complete the survey by October 11, 2013. Your feedback is very important. Please take this opportunity to provide your comments and suggestions about your training and support experiences. Thanks to Chris Wallace and Diana Sancya continued from page 1 2 October 2013
2014 Malibu Stop/Start System continued from page 2 If the crank time exceeds 2 seconds, a manual ignition switch restart will be necessary. System Components ECM Monitors the various inputs to determine stop/start conditions; also controls the auxiliary coolant pump motor and auxiliary transmission fluid pump motor TCM Determines the driver-selected gear Engine Coolant Temperature Sensor Used to determine the engine operating temperature Intake Air Temperature Sensor Used to monitor ambient air temperature; if too cold, an Auto Stop will not occur Inside Air Temperature Sensor Used to monitor passenger compartment temperature; restart may be required based on the temperature reading Vehicle Speed Sensor Used to determine vehicle speed Hood Ajar Switch If the hood switch is open, an Auto Stop will not occur. If the hood is opened during an Auto Stop, the engine will automatically restart Brake Booster Vacuum Sensor Used to ensure proper brake pedal power assist Brake Pedal Position Sensor and Accelerator Pedal Position Sensor Used to determine the activation level for each to support a stop/start event Insufficient Cooling when the A/C Compressor is On The 2012-2013 Equinox and Terrain equipped with the V6 engine (RPO LFX) may have erratic or insufficient cooling when the A/C compressor is turned on. This condition may be due to the A/C 1. A/C compressor upper bolt compressor not 2. A/C compressor rear bolt being torqued properly at the time of 3. A/C compressor lower bolt assembly, causing a load on the compressor shaft. Loosen the A/C compressor mounting bolts and re-torque. The A/C compressor should be held tight/flush to the engine block during the final torque sequence to ensure proper alignment. Refer to the appropriate Service Information for the A/C Compressor Mounting torque and tightening sequences. After the compressor mounting bolts have been torqued, run the vehicle with the A/C on for a minimum of two minutes to ensure sufficient A/C performance. Thanks to Doug Daugherty Transmission Gear Shift Position Switch Used to determine if the transmission is in the proper state to allow a stop/ start event Auxiliary Transmission Oil Pump Will be turned on during an Auto Stop to provide the transmission with the proper fluid pressure required to support Auto Start drive away shifting Auxiliary Coolant Pump Motor Will be turned on during an Auto Stop to ensure the proper cabin temperature based on the HVAC system settings BCM Monitors the Intelligent Battery Sensor for use in the Battery State Estimation system; also is the gateway for instrument cluster and HVAC system operation related to stop/start functionality Battery Sensor Module Monitors the battery sensor information on battery voltage and current, state of health, state of function and state of charge Instrument Cluster Displays on the tachometer when in an Auto Stop event Primary 12V Battery Primary energy storage device Auxiliary 12V Battery Auxiliary energy storage device Dual Battery Control Module Switches primary and auxiliary batteries in and out at appropriate times to support vehicle loads and battery charging Thanks to Ryan Brown, Ron Caponey, Stephen Patrick and Len Tillard Water Leak into Rear Floor Water may pool into the rear floor pan on either the driver or passenger side of some 2010-2014 Camaro coupes and convertibles. TIP: The possibility of this condition may be easily overlooked when diagnosing convertible water leaks. Water test the vehicle to duplicate the condition. Remove Water leaking past the water deflector. the door trim panel of the affected side of the vehicle to inspect for water pooling in or leaking from the door water deflector. If water is pooling between the door and water deflector, or is leaking past the water deflector, carefully remove the water deflector. Reseal it to the door using a butyl rope, such as 3M Strip-Calk or equivalent, to eliminate the possibility for pooling or leaking. Thanks to Jeremy Richardson October 2013 3
Engine Runs Rough Condition; Inspect Ignition Coil Grounds Some 2010-2011 LaCrosse models equipped with the with 3.0L V6 (RPO LF1) or 3.6L V6 (RPO LLT) may have an engine runs rough or engine misfire condition along with an illuminated or flashing Service Engine Soon light. Check for any stored DTCs. If DTC P0300 (Engine Misfire Detected) is present, the ignition coil grounds should be inspected. G122 is the ground for ignition coils 1, 3 and 5 and is located on the left rear corner of the right engine cylinder head. G123 supplies the ground for ignition G123 coils 2, 4, and 6 and is located on the on the left front corner of the engine cylinder head, near the high pressure fuel pump. Follow the SI Master Electrical Component List, Locator View for ground illustrations. TIP: If loose grounds are found, also inspect for potential damage to the affected bank catalytic converter. Thanks to David Roat G122 Excessive Dust in the Cabin Some 2014 Silverado 1500 and Sierra 1500 owners may comment that there is excessive dust intruding into the cabin of the truck. This condition is more noticeable when the HVAC system is in Recirculation mode. When Recirculation mode is enabled, the outside air is completely closed off and the HVAC system is recirculating 100% of the cabin air, which results in very low cabin pressure and may allow dust to enter the cabin at various locations. Updated HVAC calibrations have been released that will close the recirculation door 90% when in Recirculation mode. This will allow the HVAC system to draw in approximately 10% outside air, slightly pressurizing the cabin and making it more difficult for dust to enter the cabin. This is similar to how the previous generation truck s Recirculation mode operated. TIP: The new calibration may have a marginal decrease in HVAC cooling and slightly more outside ambient noise being heard in the cabin while the HVAC system is in Recirculation mode. If an owner would like to keep the factory calibration in which the recirculation door closes off 100% of the outside air, advise the owner to place the HVAC system in fresh air mode while traveling on dusty roads to reduce the amount of dust entering the cabin. If the owner would like the updated HVAC calibration that allows for approximately 10% outside air to enter the cabin, reprogram the HVAC Module. Select the calibration to correct dust intrusion in TIS2Web. Thanks to James Will Sunroof Reverses after Contacting Air Deflector On some 2013-2014 ATS models equipped with a sunroof, the sunroof glass may contact the air deflector while express closing, and then reverses to the open position. Perform the Sunroof Window Motor Initialization procedure in the appropriate Service Information and re-evaluate the condition. Thanks to Stephen Jacob HMI Module Damage Due to SD Card When Service Bulletin Update 12257 was originally released for 2013 ATS, SRX and XTS models equipped with a navigation system (RPOs I06, UY4), a copy of SD Card 23113171 was supplied to dealerships and additional cards were also available through the Warranty Parts Center. These SD cards were only meant to be used to program vehicles that had Service Update 12257 listed as open in the Global Warranty system and were not meant to program other vehicles. Do not use SD Card 23113171 to program any other vehicles. Human Machine Interface (HMI) module damage may occur when the HMI module is programmed with SD Card 23113171 and Service Update 12257 does not apply or has been closed. This is due to the mapping software in the HMI module being newer than the software on SD Card 23113171. All vehicles have had Service Update 12257 completed and are closed in the Global Warranty system. Discard any copies of SD Card 23113171 (WPC658) to prevent any possible HMI damage from occurring due to incorrect programming. Thanks to Zach Gillett 4 October 2013
Front Seat Cushion Movement The driver s and/or passenger s seat lower cushion on some 2013-2014 ATS models may have excessive lateral or vertical seat movement, accompanied by a clunk-type feeling or a click-type noise. This condition occurs when the seat is occupied and the vehicle is being driven on roads with multiple curves. The front seat cushion condition may be caused by movement between the seat pan front pivot points and the seat frame, or the seat spring rear mounting hooks where they attach to the seat frame. The plastic attachment points may stick and then slip. The front seat pan pivot points and the seat cushion support mounting hooks should be lubricated. Seat pan pivot In addition, there may be excessive clearance between the power seat vertical adjuster actuator and the attachment point on the seat frame. To address this, install a shim clip Seat pan pivot contact surface. between the power seat vertical adjustor actuator and the seat frame. Remove the lower seat cushion pad from the seat and place it on a soft, clean surface. Remove the four screws that attach the two pivots to the seat pan and remove the two seat pan pivots. Using a small brush, apply GM Super Lube (part number 12371287) on the pivot contact surface. Reinstall the pivots onto the cross bar and then reinstall the seat pan. Seat cushion support hooks Next, unhook the four seat cushion support hooks from the rear-side of the seat frame. Coat the inside of all four hooks with GM Super Lube and reinstall the four hooks onto the seat frame. To install the shim clip, locate the power seat vertical adjustor actuator attachment to the seat frame. Slightly spread the Install the shim clip to the power seat vertical adjustor actuator attachment. bracket on the seat frame if needed for clearance and install the shim clip. TIP: The shim clip is only available from the Warranty Parts Center. Refer to #PI1070 for complete repair instructions and shim clip ordering information. Thanks to Mark Gordon and Gary Kirrkamm Outside Temperature Display Will Not Update The outside temperature display in the radio may not update and displays at 32 F (0 C) on some 2014 Silverado 1500 and Sierra 1500 trucks. This condition may have started after disconnecting the battery or reprogramming a module. The outside temperature will begin to update if driven above 20 mph for at least five minutes. If the vehicle speed drops below 20 mph, the timer will reset and the display will stop updating. Once the display starts to update, it may take several more minutes of driving above 20 mph for the display to fully update. Further, if the vehicle sits for at least eight hours, the display will be updated when the ignition is turned on. Thanks to Jim Will October 2013 5
New Chassis Control Module Name Beginning in the 2014 model year in all publications and service tool references, the term Chassis Control Module is used for most GM models, consolidating the former names of Fuel Pump Control Module, Fuel Pump Flow Control Module, Fuel System Control Module, and Fuel Pump/ Trailer Brake Control Module. This includes references in the Electronic Parts Catalog (EPC), and GDS 2. However, there are a limited number of models that will continue to reference the original component names in the Service Information diagnostics and schematics. The following models have mixed references: 2014 Impala Limited (VIN W) 2014 CTS Wagon, CTS Coupe, CTS-V (VIN D) 2014 Traverse, Acadia, Enclave (VIN R/V) 2014 Express, Savana (VIN G/H) The Chassis Control Module may be known by a different module name in some Service Information references. 2014 Tahoe/Suburban, Yukon/Yukon XL, Escalade (GMT 900) 2014 Silverado 2500/3500 HD, Sierra 2500/3500 HD In order to help clarify these mixed references, the term Chassis Control Module along with the original component name is listed in the Service Programming System (SPS) and in the Service Information routing tables, such as the Control Module References and Master Component Lists. Thanks to Kevin Fondaw, Daniel Rose and Ching-Yu Meng Unwanted Trunk Opening Owners of some 2014 Impala models and 2013 ATS models (applies to ATS models built prior to April 8, 2013 only) may experience the trunk opening without having requested the trunk to open. The unwanted trunk opening may be due to the trunk release button on the Remote Keyless Entry transmitter (key fob) requiring a quick button press (only 0.2 seconds is required) to open the trunk. As a result, the trunk may be opening when the key fob button is inadvertently pressed while in a pocket or purse. If this condition is present and the owner would like to increase the amount of time required when pressing the key fob trunk release button, contact the Techline Customer Support Center (TCSC: 1-800-828-6860, English, or 1-800-503-3222, French) for a VCI number to install a new BCM calibration. The new calibration will extend the required minimum time for a trunk release button press on the key fob to one second. TIP: Once programmed, inform the customer about the new operation of the key fob. It will be necessary to press and hold the trunk release button for one second before the trunk will open. Thanks to Christopher Hightower and Stephen Jacob New Silverado 1500 and Sierra 1500 Tailgate Hinge Lubrication The new 2014 Silverado 1500 and Sierra 1500 feature an available EZ Lift-and- Lower Tailgate (RPO PPA) that aids in raising and lowering the tailgate. The new tailgate uses an internal torsion bar to reduce the effort needed to raise and lower it, while a rotary damper allows for a more gradual lowering motion when opening it. The tailgate is also easily removable without tools. The left tailgate hinge incorporates the assist mechanism. The hinge must be lubricated to ensure its proper operation. Outboard side of the left hinge Lubricate the left tailgate hinge Inboard side of the left hinge Spray Super Lube Synthetic Multipurpose Lubricant into the inboard side and outboard side of the left tailgate hinge assembly during scheduled maintenance visits. The hinge can be lubricated with the tailgate on the vehicle. Thanks to Gary Kirrkamm 6 October 2013
GM TechLink is published for all GM retail technicians and service consultants to provide timely information to help increase knowledge about GM products and improve the performance of the service department. Publisher: John Meade GM Customer Care and Aftersales Editor: Lisa G. Scott GM Customer Care and Aftersales Technical Editor: Mark Spencer /mspencer@gpstrategies.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 2013 General Motors All rights reserved. Blank Radio Display On some 2014 Impala, Silverado 1500 and Sierra 1500 models equipped with radio RPOs IO4, IO5, or IO6, the radio display may be blank and/or DTC U150F (Linear Interconnect Network, LIN, Bus 15) may be stored in the radio/hvac controls. Ignore this DTC if it is stored in history with no symptoms reported. If set as a current DTC, check LIN Bus 5 (circuit 7527) between the Info Display Module and Human Machine Interface (HMI) module for an open, short to ground, short to power, or poor terminal tension condition. Thanks to Zach Gillett Front Brake Rotor Cooling Rings During Pre-Delivery Inspection (PDI) of the 2014 Corvette Stingray, two rings and a coil of safety wire will be found in the loose items bag. There may be some question about the purpose of these items and/or how to install them. The two rings are the front brake rotor cooling rings. They are NOT to be installed during the PDI process, but rather given to the customer at the time of delivery. TIP: Do not leave the rotor cooling rings installed after a track event as this can cause corrosion with long-term use. Rotor cooling rings are for race track use only. Race track driving without the rotor cooling rings may result in brake pedal fade. More information on the installation of the rotor cooling rings can be found under Rotor Cooling Ring in the Track Events and Competitive Driving section of the Owner Manual. Thanks to Jeremy Richardson New Axle Lubricants New fluids are now available for axle service on 2014 Silverado 1500; 2007-2013 Silverado, Suburban, Avalanche, Tahoe; 2014 Sierra 1500; 2007-2013 GMC Sierra, Yukon; and 2007-2013 Escalade models. Axle lubricants are not stocked by Customer Care and Aftersales. The part number listed in the catalog may show no stock at Customer Care and Aftersales. Ordered lubricants are shipped directly from the supplier. Use the following chart when ordering axle lubricants for the models listed. 2014 Silverado and Sierra Front Axle (S4wd F4wd) 1500,2500,3500 U.S. Part Number GM Spec Canadian Part Number SAE 75W-90 88900401 9986115 89021678 Rear Axle (1500) SAE 75W-85 19300457 9986375 19300458 Rear Axle (2500/3500) SAE 75W-90 88900401 9986115 89021678 2007-2013 Silverado, Sierra, Suburban, Avalanche, Tahoe, Escalade and Yukon * Front Axle (S4wd F4wd) 1500,2500,3500 SAE 75W-90 88900401 9986115 89021678 Rear Axle 1500, 2500, 3500 SAE 75W-90 88900401 9986115 89021678 Cars and Crossovers * Front Axles SAE 75W-90 88863089 9986285 88863090 Rear Axles SAE 75W-90 88863089 9986285 88863090 * Any axle requiring additive still requires the additive. Any axle requiring Dexron Ls still uses Dexron Ls. Any PI or TSB suggesting the use of Dexron Ls in place of rear axle lube with additive should also use Dexron Ls gear oil. Thanks to Steve Schipansky and David MacGillis October 2013 7
Car Issues Fix It Right the First Time Model Year(s) Vehicle Line(s)/Condition Do This Don t Do This Reference Information/Bulletin 2013-2014 Sonic Poor A/C performance, DTC B3933 Replace Evaporation Air Temp sensor Replace A/C compressor PI1044 2012-2013 Sonic Odometer displaying dashes instead of miles or kilometers 2013 ATS Locking fuel door will not open or difficult to open Reprogram IP cluster with new software Replace IP cluster PI1054 Update the BCM software Replace the fuel door PI1045 2013-2014 ATS Front seat lateral or vertical movement and/or click-type noise Lube the seat pan and seat cushion spring hooks Replace the seat frame PI1070 2011-2014 CTS-V Coupe, CTS Coupe Information on rear bumper fascia and quarter panel paint appearance Use this PI to demonstrate perception of rear fascia color variation is by design 2014 CTS New model features and service guide Review this PI to become more familiar with the new 2014 CTS sedan Paint fascia, deck lid, or quarter panels for this condition Perform warranty repairs on items that are by design PI0218A PI1073 2014 CTS Information On front bumper fascia to hood and fender panel paint appearance Use this PI to demonstrate perception of front fascia color variation is by design Do not paint fascia, hood or fenders for this condition PIC5909 2014 CTS Information Towing/transport recommendations for Cadillac CTS to avoid vehicle damage 2013 Cruze Hesitation at high ambient temperature conditions Use tow eye provided in car and wheel strap tie-downs when towing the 2014 CTS sedan. Review this with your tow companies If the customer s symptoms match this description and there are no DTCs set to aid in the diagnosis, then a programming update to the engine control module may be needed 2014 Corvette Stingray New model features Please read this for important information to help answer possible customer inquiries Pull or tie down using J-hooks or chains under car. Vehicle damage may occur Program the ECM if the customer symptoms do not match the PI description. This calibration will not fix other driveability issues N/A PI0844A PI1052 PI1056 2014 Corvette Being shipped with a transportation cover Please make sure to leave the cover on the vehicle for protection during storage and offer the cover to the customer at delivery Throw away the transportation cover PI1066 2013 SRX, XTS Unwanted activation of rear heated seats Confirm issue and inform customer engineering is developing HVAC module software Replace any rear heated seat components for false activation PI1060 2013-2014 ATS, XTS, SRX, CTS Engineering Information Power driver seat inoperative, power outside mirror inoperative Please contact engineers listed in EI bulletin prior to performing any repairs for memory seat performance issues Replace any memory seat components without speaking with engineers PIE0269 8 October 2013
Truck Issues Fix It Right the First Time Model Year(s) Vehicle Line(s)/Condition Do This Don t Do This Reference Information/Bulletin 2007-2013 All Lines Application of anti-corrosion materials Use only these approved materials and procedures for this repair Use paint or undercoating materials 01-08-51-003D 2014 Silverado, Sierra Information on tailgate hinge lubrication Ensure proper end gate lubrication during regular maintenance Overlook end gate lubrication during regular maintenance 13-08-66-001 2014 Silverado, Sierra Information on windshield wiper blade identification Always check for correct blade location when servicing wipers Place blades in incorrect locations 13-08-43-001 2013-2014 Terrain, Equinox Malfunction Indicator Lamp (MIL) on, reduced power mode, DTC set, poor performance/shifts Check for the ECM wiring harness rubbing at the ECM bracket and repair the affected circuit Replace ECM or ECM harness PI1067 2014 Silverado, Sierra Diagnostic tips for difficult to resolve tire/wheel vibration concerns For difficult to resolve vibrations, the Electronic Vibration Analyzer or MTS4100 must be used along with this information Proceed with any tire, wheel, or component replacement unless the frequency, order, and magnitude of the vibration are known 13-03-10-002 2012-2014 Traverse, Enclave, Acadia Waterleak from headliner at A/C outlet vents or dome light above 2nd or 3rd row seating positions Test fixed glass for leak per bulletin Replace the sunroof module PI1061 2014 Traverse, Enclave, Acadia Inaccurate fuel gauge readings Reprogram ECM Replace fuel sender of fuel gauge PI1038A 2010-2013 SRX Auto reversal of front door windows Reflash the BCM prior to replacing window regulator or motor Replace the window motor or regulator PI1046 2010-2011 SRX Snap or pop noise heard on initial brake apply from front of vehicle Use chassis ears to confirm noise is coming from front control arm rear bushing Replace the complete control arm assembly PI1047 Service Know-How 10213.10D Emerging Issues October 10, 2013 To view Emerging Issues seminars: Log in to www.centerlearning.com Select Resources, and then Video on Demand; or Select Catalog to search for the course number, and then select View > Take or Continue Course Customer Care and Aftersales October 2013 9