2012 GMC Sierra Denali Technical Service Bulletins

1,703 technical service bulletins (TSBs) are on record for the 2012 GMC Sierra Denali. 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.

• 10245738May 1, 2013Equipment. This bulletin is being revised to add additional Mandatory Minimum Tables and additional information concerning Policy decision making. Please discard Corporate Bulletin Number 11-00-89-005D (Section 00 ? General Information).
• 10139033May 1, 2013Equipment. This informational bulletin is a revision for 03-06-03-004G to add the 2014 model year and update the Labor Operation.
• 10139016May 1, 2013Equipment. This preliminary informational bulletin provides a revision of PI0360A to add the 2013-2014 model years and update the Recommendation /Instructions.
• 10113015Apr 30, 2013Electrical system, Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that during the first few launches after a key cycle, they experience a delayed 1-2 upshift or a sluggish launch with high engine speed. Technician will need to update the Transmission Control Module with the latest calibration is available through TIS2Web.
• 10113014Apr 29, 2013Transmission and drivetrain. This Preliminary Information communication advises the technician that the Allison 6 Speed Automatic Transmission Assembly part numbers 24257850, 24242411, 24258552, 24258551, 24257851, 24242413, 24258554, and 24258553 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.
• 10113011Apr 26, 2013Electrical system. This Preliminary Information communication provides information to the technician about the Multiple Diagnostic Interface or Techline computer terminal locks up during Service Programming System Sequential Programming or failed Service Programming System Sequential Programming event or no communication with any one Hybrid module. Technician will need to contact Techline customer support center for further assistance.
• 10130652Apr 25, 2013Equipment. This technical bulletin provides Warranty Administration - New Labor Codes information.
• 10113008Apr 25, 2013Fuel system. This Preliminary Information communication provides information to the technician about vehicles that after refueling the fuel gauge will show empty. Technician will find Diagnostic Trouble Code P2636. Dealer should question the owner if the key or engine is on while refueling. Dealer should the owner to turn the engine and key off, before refueling the vehicle.
• 10130650Apr 22, 2013Equipment. This preliminary information bulletin provides information on 2-3 shift flare when cold.
• 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.
• 10130645Apr 19, 2013Equipment. This technical bulletin provides a revision of 13-00-89-004 to update car issues information for reference information/bulletin PI0746C.
• 10112988Apr 19, 2013Equipment. This Preliminary Information communication provides information to the technician about vehicles that have at times the XM Traffic or Weather for the local area takes several minutes to update and may read "NO DATA" or "UPDATING" during that time. Technician should be advised that Traffic and Weather data from local reporting stations and then send the updated info process may take up to 24 minutes.
• 10112985Apr 19, 2013Air bags. This Preliminary Information communication provides information to the technician about the passenger presence system, passenger air bag on/off indicators, passenger air bag on/off switch, and passenger seat belt indicator. Dealer can review and explain the options that are equipped with the vehicle in question.
• 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…
• 10130634Apr 15, 2013Equipment. This preliminary information bulletin provides a revision of PI0564B to add models.
• 10130631Apr 15, 2013Equipment. This technical bulletin provides a revision of 03-06-03-003B to add the 2010-2014 model years, update the Attention statement, change the terms Claim Type B to Claim Type ZPTI, GM Dealer to GM Service Agent, Repair Order to Job Card, Warranty Claim to Warranty Transaction, and to update the Procedure Information for submitting Vehicle Repairs from WINS to Global Warranty Management (GWM).
• 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…
• 10130628Apr 11, 2013Equipment. This technical bulletin provides a revision of 12-04-21-001A to add the 2013 model year, clarify the information from the previous bulletin and to add data throughout. The document should be reviewed and treated as new information.
• 10130627Apr 11, 2013Equipment. This technical bulletin provides a revision of 99-04-20-002G to add 2013-2014 model years.
• 10130619Apr 8, 2013Equipment. This technical bulletin provides a revision of 10-00-89-017Z to include updated information.
• 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.
• 10130611Apr 3, 2013Equipment. This preliminary information bulletin is for information on COAX Repair Kit Availability. Revised from PI0572A
• 10130610Apr 2, 2013Equipment. This technical bulletin provides a revision of 02-06-01-022M to add the 2013 model year.
• 10247766Apr 1, 2013Equipment. Unwanted Alarm Sounding (GM Accessory Inclination Sensor Mounting)
• 10247765Apr 1, 2013Electrical system. Fuel Gauge Shows Empty After Refueling And DTC P2636.
• 10247110Apr 1, 2013Electrical system. Fuel Gauge Shows Empty After Refueling And DTC P2636.
• 10246616Apr 1, 2013Equipment. Car and Truck Fix it Right the First Time Issues
• 10246615Apr 1, 2013Equipment. Car and Truck Fix it Right the First Time Issues
• 10246614Apr 1, 2013Electrical system. Vehicle Software Enhancements
• 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.
• 10112947Mar 29, 2013Brakes, Electrical system, Transmission and drivetrain. This Preliminary Information communication provides information to the technician with the steps on diagnosing and repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages ? Brake Pedal Override Feature ?, transmission busy or frequent shifting up or down. Technician will use this preliminary information to find the brake pedal position data parameters…
• 10134684Mar 27, 2013Body and structure. This bulletin provides a procedure to replace the door panel retainers if the customers concern is a rattle noise or gap.
• 10134682Mar 27, 2013Electrical system. This technical bulletin provides information on Vehicle Software Enhancements for 2014 and prior GM Passenger Cars and Light Duty Trucks.
• 10112938Mar 27, 2013Transmission and drivetrain. This Preliminary Information communication advises the technician that the Allison LCT1000 Transmission Regular Production Option Code MW7 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.
• 10134681Mar 26, 2013Equipment. This warranty administration bulletin provide policy information on clarification of use-dealer empowerment labor operations and customer enthusiasm.
• 10134680Mar 26, 2013Electrical system. This informational bulletin provides information accessory power outlet and trailer lighting fuse replacement due to electrical systems that can be affected by devices that are plugged in by the customer.
• 10112937Mar 26, 2013Transmission and drivetrain. This Preliminary Information communication provides information to the technician about vehicles that have Diagnostic Trouble Code P0016 stored. Technician will need to inspect the reluctor on the crankshaft. If the reluctor has moved replace the crankshaft.
• 10134676Mar 25, 2013Electrical system, Transmission and drivetrain. This preliminary information bulletin provides information on powertrain and various electronic/electrical control issues.
• 10134675Mar 25, 2013Equipment. This informational bulletin provides information for dealers to properly maintain vehicle in inventory.
• 10112935Mar 25, 2013Electrical system. 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.
• 10134674Mar 22, 2013Suspension. This informational bulletin provides information on how to remove the body mount bolt due to being stripped or will not loosen.
• 10134672Mar 22, 2013Seats. This informational bulletin provides information on the proper cleaning products for GM hard or plastic surfaces, seats carpet, vinyl.
• 10134671Mar 22, 2013Electrical system, Transmission and drivetrain, Equipment, Tires. This technical bulletin provides a procedure on aftermarket ALSL or DLC devices causing multiple issues due to suspected tampering.
• 10134665Mar 20, 2013Back-over prevention (rear camera). This preliminary information bulletin provides information and additional diagnostics on park assist blocked being messaged on the DIC.
• 10112926Mar 20, 2013Equipment. This Preliminary Information communication provides information to the technician about vehicles that have navigation or radio screen is blank or flashes on and off, no sound from speakers, and rear DVD screen inoperative. Technician will find Diagnostic Trouble Codes B1265, B1288, or B1289. Technician will need to repair circuit 7066.
• 10134662Mar 19, 2013Engine, Transmission and drivetrain. This informational bulletin provides information of suspected tampering or vehicle modifications for non-GM (Aftermarket) engine and transmission calibrations for V6 and V8 gasoline engines Using Tech 2® or global diagnostic system 2 (GDS 2)
• 10112920Mar 19, 2013Electrical system. This Preliminary Information communication provides information to the technician about vehicles that have intermittent Diagnostic Trouble Code P0340. Technician will replace the cam position sensor if the vehicle build is Sept or Oct of 2012 and SI diagnostics does not lead to a resolution.

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