2012 GMC Sierra Technical Service Bulletins

279 technical service bulletins (TSBs) are on record for the 2012 GMC Sierra. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10113209Aug 22, 2013Engine, Equipment. This Preliminary Information communication provides information to the technician about vehicles that a tick ping noise on torque reversal or load. Technician will need to replace the propeller shaft. Technician will need to contact General Motors Technical Assistance Center for further assistance if the vehicle was built January 1, 2013 or later.
• 10113494Aug 19, 2013Engine cooling, Equipment. This informational bulletin provides information on close-coupled converter and engine replacement.
• 10113492Aug 15, 2013Seat belts. This informational bulletin provides information on availability for the seat belt extender.
• 10113485Aug 6, 2013Equipment. This preliminary information bulletin provides a procedure for installing a aftermarket tool or utility box.
• 10113483Aug 5, 2013Tires. This warranty administration bulletin provide policy information new tire warranty program and global warranty management submission information.
• 10053223Jul 1, 2013Transmission and drivetrain. Gm: some vehicles may display on the driver information center (dic) "transmission hot- idle engine". Dtc u0101 may be set. Mil may be illuminated.
• 10113069Jun 28, 2013Transmission and drivetrain, Engine cooling. This Preliminary Information communication provides information to the technician abut vehicles that have a knock noise or vibration from the engine or transmission. Technician will need to inspect the flex plate. The flex plate and transmission bell housing should be replaced if the flex plate is found cracked.
• 10113067Jun 27, 2013Equipment, Engine cooling. This Preliminary Information communication advises the technician that the Allison A1000 Valve Body part number 29545998 will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
• 10113066Jun 27, 2013Transmission and drivetrain. This Preliminary Information communication advises the technician that the Allison 6 Speed Automatic Transmission Assembly will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
• 10113064Jun 27, 2013Transmission and drivetrain, Equipment. This Preliminary Information communication advises the technician that the Allison Transmission Control Module will be placed on a parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
• 10113062Jun 25, 2013Visibility (wipers, defrost, mirrors). This Preliminary Information communication provides information to the technician about an owner that may request to have a different style mirror installed on their vehicle or request a different mirror before they purchase the vehicle. Swapping mirrors on vehicles equipped with Side Blind Zone Alert, Regular Production Option Code UFT, is not recommended. On other vehicles tech will need to verify if the vehicle…
• 10113060Jun 24, 2013Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that have an audible engine whine noise at 1500-1800 revolutions per minute. Technician will need to check the coolant level, remove serpentine belt to verify noise goes away, rotate the thermostat 90 degrees and retest, then replace thermostat and retest. Technician will replace the water pump if there is no change.
• 10113059Jun 24, 2013Engine cooling. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first…
• 10038344Jun 1, 2013Latches, locks and linkages. Gm: the front or rear door may not open from the inside or outside handle, the door will not unlock with any method. The probably cause an incorrect installation of a handle component. *rm updated on 7/26/2013. All 2014 and prior gm passenger cars and trucks.
• 10052311May 1, 2013Engine cooling. General motors: low engine oil pressure, no oil pressure, and/or engine noise. This could be the result of a sticking oil pump pressure relief valve.
• 10043887May 1, 2013Steering, Electrical system. Gm: the service stabilitrak message being displayed in dic. The stabilitrak indicator light may also be on. *js updated on 7/9/2013.
• 10039489May 1, 2013Transmission and drivetrain. Gm: the transmission is slipping or has no forward/reverse movement. *rm updated 4/16/12. *pe updated 6/18/12. *pe updated on 7/09/2013.
• 10112995Apr 22, 2013Engine cooling. This Preliminary Information communication provides information to the technician of additional information while diagnosing a diagnostic trouble code P0420. Check for a possible leak in the exhaust system behind the bank one number 2 oxygen sensor. If a leak is found or there is an aftermarket utility bed or trailer hitch installed. Check for a minimum clearance of 1.5 to 2 inches of the exhaust system.
• 10112994Apr 22, 2013Electrical system, Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that have a clunk noise or a harsh 6-5 downshift while driving at 50 to 70 miles per hour. Technician will reprogrammed the Transmission Control Module and a FastLearn procedure will need to be performed to correct the condition.
• 10112974Apr 16, 2013Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P0420. Technician will need to follow published Service Information diagnostics. Technician will check for a possible leak in the exhaust system behind the bank 1 sensor 2 O2 sensor. Technician will need to…
• 10112973Apr 16, 2013Equipment. This Preliminary Information communication provides information to the technician about vehicles that for no reason the alarm will go active. Technician will need to use a scan tool to verify that the alarm was activated by the inclination sensor. If the trigger is the inclination sensor, inspect the sensor's mounting location. Technician will need to relocate the sensor if it is attached to the driver's side lower…
• 10112966Apr 12, 2013Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that have an audible engine whine noise at 1500-1800 revolutions per minute. Technician will need to check the coolant level, remove serpentine belt to verify noise goes away, rotate the thermostat 90 degrees and retest, then replace thermostat and retest. Technician will replace the water pump if replacing the…
• 10112958Apr 5, 2013Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that have low oil pressure, no oil pressure, and/or engine noise. Technician will need to replace the oil pump, flush the oil cooler lines.
• 10112955Apr 4, 2013Engine cooling. This Preliminary Information communication provides information to the technician about vehicles that may have a cold engine tick noise for 50 seconds at start up. Technician determines if the tick noise is possibly coming from the exhaust manifold, as this noise could easily be mistaken for an engine tick noise.
• 10052297Apr 1, 2013Electrical system. General motors: on some trucks and passenger vehicles, accessory power outlets (apo) and trailer lighting are common accessed electrical systems that are affected by devices that are plugged in and become inoperative due to an open fuse and no problem with vehicle identified. Models years 2010-2014 trucks and passenger. No models.
• 10052205Apr 1, 2013Engine cooling. General motors: service engine soon light illuminated on dash. There may also be increased engine noise, or possible higher rpm shifts, and reduced a/c performance.
• 10112901Mar 14, 2013Engine cooling, Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that will not move in forward or reverse. Technician may find Diagnostic Trouble Code P0701 P0729 P0731 P0732 P0733 P0734 P0735 P0751 P0756 P0761 P0877 Or P2723 set. Technician will need to inspect the valve body separator plate orifices for debris.
• 10052064Mar 1, 2013Electrical system. General motors: hybrid battery parts restriction for high voltage 2-mode battery parts.
• 10051905Feb 1, 2013Body and structure. Gmc/chevrolet: the passenger and/or driver door module courtesy lights calibrations are the same, with or without, door panel courtesy lights. Model 2007-2013 avalanche, silverado, suburban, tahoe, sierra, yukons. 8pe
• 10043850Feb 1, 2013Steering. Gmc: hydraulic power steering leak at hose connection to steering rack. All potential leaks should be completely cleaned and indentified before attempting to repair or replace any power steering components. *js updated 4/22/13.
• 10112763Jan 31, 2013Equipment. This Preliminary Information communication provides information to the technician about vehicles that have a cold air leak on the front passenger side while driving. Technician will need to use black RTV silicone and apply over the seam between the upper and lower Heater-Vent-Air Conditioning case halves.
• 10112745Jan 30, 2013Back-over prevention (rear camera), Equipment. This Preliminary Information communication provides information to the technician that during the Pre-Delivery Inspection it may be noticed that the backup alarm is inoperative. Technician can locate the wire harness on the right rear of the frame. Technician can route the harness up and over the spare tire hoist tube and connect to the backup alarm.
• 10112744Jan 29, 2013Engine, Fuel system. This Preliminary Information communication advises the technician that 2013 6.6L Duramax Diesel Engine Regular Production Option Code (LGH and LML) part number 12638502 will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
• 10112740Jan 25, 2013Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that may have a service 4WD message displayed in the Driver Information Center. Technician may find Diagnostic Trouble Code C0379. Technician will need to inspect the front axle actuator connector for signs of moisture intrusion. If there is corrosion on the terminals at either location replace the actuator and harness.
• 10112737Jan 23, 2013Electrical system. This Preliminary Information communication provides information to the technician about vehicles that the speedometer needle appears to be inaccurate. Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 miles per hour at any given speed when looking straight at the needle.
• 10112734Jan 22, 2013Engine cooling. This Preliminary Information communication advises the technician that vehicles with engine Regular Production Option Code LGH or LML may have an Exhaust Fluid Quality Poor message displayed on the Driver Information Center. Technician will need to complete the current Service Information diagnostic for any current Diagnostic Trouble Codes or symptoms found.
• 10112733Jan 22, 2013Fuel system. This Preliminary Information communication provides information to the technician that engineering is asking for additional information if SI diagnosis leads to replacement of the Indirect Fuel Injector for a P0420 Diagnostic Trouble Code. Technician should follow published Service Information diagnostics for Diagnostic Trouble Code P0420.
• 10112725Jan 16, 2013Engine. This Preliminary Information communication provides information to the technician about vehicles that have misfires on cylinders 1, 4, 6 and 7. Technician should inspect the camshaft part numbers. Technician should ensure to use part number for the application by using the numbers stamped on the cam.
• 10112723Jan 16, 2013Engine cooling, Fuel system. This Preliminary Information communication provides information to the technician about vehicles that the scan tool reading showing varying diesel particulate filter soot mass readings on a 2012 Silverado or Sierra. Technician should check the Tech 2's software version if the version is 31.00 the scan tool will need to be updated.
• 10112717Jan 14, 2013Engine cooling, Electrical system. This Preliminary Information communication provides information to the technician about vehicles that have a rough idle and/or momentary lack of power after cold starting the engine and immediately placing the transmission in gear. Technician should follow published Service Information diagnostics first. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.
• 10112716Jan 14, 2013Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that may have a ticking noise when driving above 30 miles per hour in third and fourth gear. Technician will need to replpace the Reaction Carrier, Low and Reverse Roller Clutch Race, and the Low and Reverse Roller Clutch.
• 10051760Jan 1, 2013Engine. Chevrolet/gmc: after cold starting engine and placing in gear, would have a rough idle and/lack of power, momentarily before startup a few minutes later. Models 2009-2013 express, silverado, suburban, savana, sierra.
• 10112697Dec 27, 2012Equipment, Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308.
• 10113849Dec 20, 2012Engine cooling. This informational bulletin provides information on the proper oils to use on GM vehicles including information regarding the differences of the Dexos oils.
• 10112690Dec 18, 2012Equipment. This Preliminary Information communication provides information to the technician about vehicles that have a compass that's not accurate or slow to update. Technician should check for a magnetic base roof mounted accessory interfering with the compass module.
• 10112688Dec 18, 2012Transmission and drivetrain. This Preliminary Information communication advises the technician that 2ML70 Transmission Assembly will be placed on a parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
• 10113843Dec 17, 2012Equipment. This warranty administration bulletin provides information on the Clarification of Use for Dealer Empowerment Labor Operations and Customer Enthusiasm
• 10112687Dec 17, 2012Equipment, Electrical system. This Preliminary Information communication provides information to the technician about vehicles that loose connection between the vehicle and a Bluetooth phone. Technician will need to use a scan tool to check the "Firmware Over-the-Air" value. If the "Firmware Over-the-Air" value is up to date and customer's concern is still present contact General Motors Technical Assistance Center for further assistance.
• 10112677Dec 14, 2012Equipment, Electrical system. This Preliminary Information communication provides information to the technician about vehicles that have a Diagnostic Trouble Code B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module. Engineering has determined that this code will only display in history on the scan tool and will not cause issues with OnStar system operation.
• 10112668Dec 13, 2012Exterior lighting. This Preliminary Information communication provides information to the technician about the puddle light operation. Technician should be advised that the puddle lamps to operate, "Approach Lighting" must be turned on using the Drivers Information Center buttons.

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