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.

• 10112451Oct 5, 2012Visibility (wipers, defrost, mirrors). This Preliminary Information communication provides information to the technician about vehicles that have passenger window express down feature is inoperative. Technician should be advised that models equipped with either Memory Seats Regular Production Option Code (AN3) and/or Power Folding Mirrors Regular Production Option Code (DL3) will have the passenger window express down feature.
• 10112447Oct 4, 2012Transmission 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 replace the Reaction Carrier and the Low and Reverse Roller Clutch.
• 10047919Oct 1, 2012Transmission and drivetrain. Chevrolet/gmc: the 4wd fails to engage when service 4wd indicator illuminates and transfer case control module (tccm) reports possible c0379 set. Models 2012-2013 avalanche, silverado, suburban, tahoe, sierra, yukon, yukon xl.
• 10047839Oct 1, 2012Steering, Electrical system. Cadillac/chevrolet/gmc: will have inoperative cruise control; inoperative or unwanted activation of radio controls; backlighting flashes, flickers or inoperative due to possible short to ground on steering wheel coil connector x2. Models 2007-2013 escalades models, avalanche, silverado, suburban, tahoe, sierra, yukon models.
• 10047820Oct 1, 2012Engine cooling. Gmc/chevrolet: there may be an accumulation of diesel particulate filter soot level found when a diagnostic system check is performed and may be caused by engine control module (ecm) with a reduced engine power message. Model 2011-2013 express, silverado; savana, sierra.
• 10047479Sep 1, 2012Electronic stability control, Other or unknown. Gmc/chevrolet/cadillac: instrument panel messages regarding stabilitrak message, traction control message, service brake system message, is off and gauges, in various modules low speed settings, are inoperative. Models 2007-13 all escalades; avalanche, silverado, suburban, tahoe; sierra, all yukons and denalis.
• 10047459Sep 1, 2012Vehicle speed control. Cadillac/gmc/chevrolet: information on cruise control being inoperative due to bpp circuit signal and/or tcc/cruise brake pedal parameters, when brake pedal is released but shows applied. Models 2007-2013 all escalades, avalanche, silverado, suburban, tahoe, sierra, all yukons.
• 10047419Sep 1, 2012Brakes. Chevrolet/gmc/cadillac: brake pedal position (bpp) sensor has related issues after normal diagnostics, regarding connector x205, terminal concern, cruise/brake light or service stability message or reduced engine power. Models 2012-2013 all escalades, avalanche, silverado, suburban, tahoe, sierra and all yukons.
• 10047379Sep 1, 2012Equipment. Gmc/cadillac/chevrolet: hvac system, when turned on, is very noisy and there is a lack of airflow, through vents, due to blower motor failing to work properly. Models 2012-2013 escalade, esv, ext; avalanche, silverado, suburban, tahoe; sierra, yukon, yukon denali, yukon xl, yukon xl denali.
• 10045940Sep 1, 2012Equipment. Gmc/cadillac/chevrolet: no air is flowing through hvac vents because of an inoperative blower motor. The situation is intermittent. Models 2011-12 cadillac-escalade, escalade esv & ext; gmc-sierra, yukon & xl, yukon denali & xl denali; chevrolet-tahoe, suburban, avalanche & silverado. *pe updated 9/26/12.
• 10044879Sep 1, 2012Exterior lighting, Vehicle speed control. General motors: service stability message low power brake light and cruise control operation- dtc c0161 and/or c0277. New for the 2012 models is a dual brake pedal position (bpp) sensor (two sensors in one). The dual bpp replaces the old style open/closed brake switch which has been used for years. *js models 2012-13 all escalades; avalanche, express, silverado, suburban, tahoe; savana, sierra, all yukons and…
• 10045899Aug 1, 2012Electrical system, Engine. Chevrolet/gmc: starter motor, on certain suvs, may wear thru, after contact, wiring insulation, which causes circuit condition to short out. Starter motor becomes inoperative. Models 2013 chevrolet avalanche, silverado and gmc sierra.
• 10055803Jul 1, 2012Transmission and drivetrain. Cadillac/chevrolet/gmc/hummer/pontiac: there is slipping or have no fourth, fifth or sixth gear and malfunction indicator lamp (mil) would be on, with diagnostic trouble code (dtc) p0796 found as active.
• 10045519Jul 1, 2012Equipment, Electrical system. Gm-express/silverado/savana/sierra: due to poor connections and intermittent condition of map sensor connector wiring harness terminal crimps, trucks have a malfunction indicator lamp (mil) illumination and reduced engine power display message.
• 10045063Jun 1, 2012Transmission and drivetrain. Gmc/chevrolet: some trucks, equipped with automatic transmission 4l60e, may experience slipping, missed or late shifts in 3rd and 4th gears due to possible 3-4 clutch distress.
• 10045041Jun 1, 2012Engine, Engine cooling. Gmc/chevrolet: if not torqued to specification, on certain trucks, bolts on 4 water pump pulley, could back out or break.
• 10044391May 1, 2012Transmission and drivetrain. Gmc/chevrolet: malfunction indicator lamp (mil) is illuminated and has a harsh shift 1-2. The tcc enable solenoid and wire harness should be replaced when repairs are performed on transmission.
• 10044242May 1, 2012Electrical system. Gm: j-35616-64b terminal test probe and replacement terminal. Also included models verano, regal, lacrosse, cts, srx, volt, sonic, malibu, impala, equinox, cruze, avalanche, tahoe suburban, silverado, sierra, yukon, and terrain for model year 2013. Model escalade model year 2012-2013. Model pontiac g3 model year 2007. Model wave model years 2005-2010. Denali models model years 2007-2013.
• 10044233Mar 1, 2012Transmission and drivetrain. Gm: tick or rattle noise from front of dash, transmission filler tube cracked or broken (inspect filler tube, replace tube as necessary). *js updated 05/3/2013
• 10043849Mar 1, 2012Air bags. Gm: air bag warning lamp illuminated, repeat history dtc b0083 0f- b0088 0f on vehicles operated in amarillo texas area. An updated software calibration has been released to address this condition. Also included in models years 2010-2012 model:cadillac escalade hybrid; chevrolet silverado hybrid; chevrolet tahoe hybrid;gmc sierra denali; gmc sierra hybrid;gmc yukon hybrid; gmc yukon denali hybrid.
• 10043829Mar 1, 2012Transmission and drivetrain. Gm: loss of high speed gmlan communications, intermittent no crank, ip gage fluctuation, intermittent door look cycling, intermittent chime operation, various ip warning lamps illuminated, transmission may not shift, communication dtcs u0073, u0100, u0101, u0102 u0121 or u0140 set (repair terminals in transmission harness connector, repair open or shorted gm high speed lan circuits, open or shorted data link…
• 10041435Mar 1, 2012Fuel system. Chevrolet/gmc: at high pressure pump to high pressure fuel lines there are signs of fuel leakage and/or fuel odor. *pe updated on 5/2/2012.
• 10026624Mar 1, 2012Engine cooling. Gmc: correct front axle vent hose routing. The front axle vent hose is mounted in the left side of the engine compartment, and may not be correctly routed. *pe updated on 5/1/2012.
• 10043904Feb 1, 2012Electrical system, Equipment. Service update for inventory and customer vehicles. Radio display may be inoperative or flicker - expires with base warranty.
• 10043629Feb 1, 2012Steering. General motors: reservoir for power steering fluid is heat damaged and leaking. May caused problems with power steering pump.
• 10043185Nov 1, 2011Transmission and drivetrain. Cadillac/chevrolet/gmc/hummer: some suvs and trucks are exhibiting a condition where by grinding/ratcheting type noise coming from automatic transmission when shifting into park while in 4wd low (4lo) range.
• 10042990Nov 1, 2011Air bags. Chevrolet/gmc: see document search button for owner letter. On certain model vehicles, a condition where roof rail airbags, may been improperly routed on right side, resulting in deployment.
• 10042286Oct 1, 2011Transmission and drivetrain. Cadillac/chevrolet/gmc: certain model vehicles my 2010-2012, the transmission has developed a leak in the rear.
• 10030766Apr 1, 2011Suspension. Chevrolet/gmc: a clunking noise coming from the rear of the vehicle. Upon further investigation, the technician may diagnose the noise coming from the rear suspension leaf spring area. *pe updated 6/30/2011.

← All problems reported for the 2012 GMC Sierra