2012 GMC Sierra 2500 Technical Service Bulletins

1,724 technical service bulletins (TSBs) are on record for the 2012 GMC Sierra 2500. 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.

• 10137928May 22, 2014Equipment, Tires. This informational bulletin explains a normal condition of new tires may shake and vibrate for the first few miles.
• 10137927May 22, 2014Equipment, Tires. This informational bulletin provides the technician with information on tire radial force variations and how to balance a tire using the balancer.
• 10137919May 19, 2014Equipment. This informational bulletin helps the technician quick reference repairs to bulletins as opposed to replacing parts that may be un necessary.
• 10137918May 19, 2014Electrical system, Equipment. This informational bulletin explains if the fuse is open when the customer plugs in the trailer, that it may be the cause if diagnostics finds no problems to that point.
• 10137914May 16, 2014Equipment. This informational bulletin provides tips on how to care for the interior of the vehicle using products.
• 10137901May 9, 2014Fuel system. This informational bulletin provides the technician with information on what E85 fuel may due to a non E85 vehicle.
• 10253148May 1, 2014Transmission and drivetrain. Auxiliary Transmission Fluid Pump.
• 10247763May 1, 2014Transmission and drivetrain. Unwanted Grade Braking - Low Power - And/Or Transmission Busy Shifting.
• 10247108May 1, 2014Transmission and drivetrain. Unwanted Grade Braking - Low Power - And/Or Transmission Busy Shifting.
• 10246983May 1, 2014Equipment. Checking Smartphone Bluetooth Software Update Status
• 10246624May 1, 2014Equipment. Car and Truck Fix it Right the First Time Issues
• 10245317May 1, 2014Electrical system. High Voltage 2-Mode Battery Parts Restriction-TAC
• 10066147May 1, 2014Fuel system. Summary to be provided on a future date.
• 10066146May 1, 2014Fuel system. Summary to be provided on a future date.
• 10056237May 1, 2014Electrical system. General motors: due to loose ground terminal connections, in some vehicles and trucks experience, accessories malfunctions, dic messages, ipc warning indicators, ses light on.
• 10135235Apr 30, 2014Electrical system. This informational bulletin provides information for an available BCM calibrations that would restore bulb outages when using a second stage manufacturer
• 10135227Apr 28, 2014Equipment. This informational bulletin provides information to the dealers on properly maintaining vehicles in inventory.
• 10093959Apr 27, 2014Equipment. 12050b - customer satisfaction (revised expiration date). Certain vehicles, all equipped with a 10.5" rear axle, may have a condition in which the rear axle right-hand side bearing adjuster clip and bolt may come loose within the rear axle. If this occurs, a grinding noise and a vehicle vibration would be noticeable when the vehicle is in motion. If the adjustor or bolt punctures the differential cover pan, a fluid…
• 10135219Apr 22, 2014Exterior lighting. This informational bulletin explains condensation in exterior lights and replacment guidelines for warranty replacement.
• 10135218Apr 22, 2014Equipment. This informational bulletin is to assist with the identification of issues that are not considered warrantable.
• 10111818Apr 22, 2014Engine. This Preliminary Information communication advises the technician that the 2010 through 2015 6.6L Duramax Diesel Engine Fuel Injection Pump Part numbers 12645102, 12658095 and 12661059 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.
• 10111812Apr 18, 2014Equipment. This Preliminary Information communication provides information to the technician about vehicles that when the front radio source is on CD and rear seat audio control is on XM, the CD track changes when the RSA control is used to change XM stations. Technician should USB update the radio using TIS2Web.
• 10111811Apr 18, 2014Electrical system, Equipment. This Preliminary Information communication provides information to the technician about vehicles that have an OnStar system that will not power up. Technician should turn off the ignition and cancel retained accessory power. After the vehicle has powered down remove power to the OnStar module for five minutes. After the power has been removed for five minutes, if the OnStar system is working release the vehicle.
• 10111810Apr 17, 2014Equipment. This Preliminary Information communication provides information to the technician about installing General Motors Accessory pats. Technician can check Service Information for some accessories. Technician can also contact Partect for assistance. Technician can also contact Techline Customer Support Center for programming issues.
• 10111805Apr 16, 2014Engine cooling, Engine. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have a no crank concern. Technician will need to check the valve train for movement when the engine is cranked. If the valve train is not moving while the crankshaft is moving the front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam…
• 10135202Apr 15, 2014Electrical system. This informational bulletin provides information on how to disable high voltage safely.
• 10135201Apr 14, 2014Equipment. This information bulletin provides the technician with additional information on fixing the vehicle right the first time by listing possible concerns to specific vehicles.
• 10135200Apr 14, 2014Equipment. This preliminary bulletin provides a procedure to install a new cabin air filter kit for vehicles that did not have one if the customer whants one installed to fix the concern of dust intruding into cabin interior.
• 10135197Apr 11, 2014Engine cooling. The purpose of this document is to provide the Service Personnel with a guide to determine which Service Information documents and scan tool parameters to reference when encountering an: Exhaust Fluid Quality Poor Message Displayed, and a Reductant Fluid Quality Test Status that will Pass, Time Out, Fail or Interrupt and other DEF Messages that may be observed.
• 10111783Apr 4, 2014Fuel system. This Preliminary Information communication provides information to the technician about vehicles that have an oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.
• 10250013Apr 1, 2014Electrical system. High Voltage Safety ? High Voltage Disabling
• 10247727Apr 1, 2014Fuel system. Bump Feel Or Clunk Noise After A Stop.
• 10247072Apr 1, 2014Brakes. Bump Feel Or Clunk Noise After A Stop.
• 10246500Apr 1, 2014Equipment, Air bags. High Voltage Safety ? High Voltage Disabling
• 10070943Apr 1, 2014Engine cooling. Summary to be provided on a future date.
• 10137887Mar 28, 2014Electrical system. This warranty bulletin explains how to use the EL-50313 Midtronic GR8 Battery tester to test a battery and determin if it is warranty or not
• 10111884Mar 27, 2014Equipment, Fuel system. This Preliminary Information communication provides information to the technician about vehicles that may have a bump feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling…
• 10111876Mar 24, 2014Body and structure. This Preliminary Information communication provides information to the technician about vehicles that the customer or up-fitter may have removed the rear bumper, install a different rear bumper, or add a different box/flat bed/cube box/hitch, etc. to the rear of the truck, which affects the rear park assist operation. Technician can disable the rear park assist for this concern.
• 10111875Mar 24, 2014Engine. This Preliminary Information communication provides information to the technician about vehicles that have an oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.
• 10137868Mar 19, 2014Engine cooling. This informational bulletin provides information to the customer to clean the exhaust filter when prompt to or the MIL may come on and the truck DPF system may fail.
• 10137866Mar 17, 2014Equipment. This informational bulletin helps the technician quick reference repairs to bulletins as opposed to replacing parts that may be un necessary.
• 10111856Mar 7, 2014Engine. This Preliminary Information communication advises the technician that the 2010 through 2015 6.6L Duramax Diesel Engine Part number 12638502 has been placed on a parts restriction through General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
• 10137852Mar 5, 2014Equipment, Fuel system. This preliminary bulletin provides procedure to correct contact between the fuel temperature sensor connector and the fuel return line for clearance.
• 10111850Mar 5, 2014Equipment. This Preliminary Information communication provides information to the technician about vehicles that when a Canadian customer may comment that when they travel to the United States, they are unable to connect to OnStar or use hands free calling. Dealer can advise the customer that the existing cell phone provider not having roaming agreements in areas outside of Canada.
• 10111849Mar 5, 2014Electrical system, Equipment. This Preliminary Information communication provides information to the technician about vehicles that have a frequent "off route" messages while following Turn by Turn route. Technicians will need to remove power from the Vehicle Communication Interface Module for one hour and retest for the concern.
• 10111848Mar 5, 2014Equipment. This Preliminary Information communication provides information to the technician about vehicles that has no XM audio on certain channels but XM channel info is displayed. Technician will need to contact XM and deactivate and activate the module.
• 10111846Mar 4, 2014Electrical system. This Preliminary Information communication provides information to the technician about a customer?s request to install OnStar Bluetooth. Dealer should be advised at this time, there are no provisions to add this option to vehicles that were not built with it.
• 10111845Mar 4, 2014Equipment, Electrical system. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicles that may have an OnStar Turn-By-Turn Navigation the system that is inoperative. Technician verifies there are no Diagnostic Trouble Codes are present in the Antilock Braking System and Vehicle Communication Interface Module of the vehicle. If no Diagnostic Trouble Codes found call OnStar using…
• 10067228Mar 4, 2014Transmission and drivetrain. 14043 - customer satisfaction. Certain vehicles, equipped with an allison 6-speed automatic transmission (mw7), may have been built with an incorrect transmission thrust bearing. Over time, this bearing could fail, resulting in noise and poor transmission operation. Dealers are to replace the thrust bearing.
• 10253605Mar 1, 2014Equipment. Poor Voice Quality During Bluetooth Call or OnStar® Personal Call.

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