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Service bulletins for the 2012 GMC Sierra

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

2268 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
120604002C2023-12-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Information on Exhaust Fluid Range, Exhaust Fluid Quality Poor, Service Exhaust Fluid System or Service Emission System Driver Information Center Messages
120604002B2023-12-11. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Information on Exhaust Fluid Range, Exhaust Fluid Quality Poor, Service Exhaust Fluid System or Service Emission System Driver Information Center Messages
990940005G2023-12-11. Service bulletin. SEAT BELTS. Seat Belt Extender Availability
990420002I2023-12-11. Service bulletin. POWER TRAIN:DRIVELINE. Information on Driveline Clunk Noise
15NA082B2023-12-11. Service bulletin. SUSPENSION. Clunking Noise from Front of Vehicle During Turns and/or Bumps
15NA0822023-12-11. Service bulletin. SUSPENSION. Clunking Noise from Front of Vehicle During Turns and/or Bumps
14061300012023-12-11. Service bulletin. EQUIPMENT:ELECTRICAL; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; AIR BAGS. High Voltage Safety ? High Voltage Disabling
1406040052023-12-11. Service bulletin. UNKNOWN OR OTHER; EQUIPMENT; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE; FUEL SYSTEM, DIESEL. Duramax® Diesel Glow Plugs Difficult to Install Due to Carbon Buildup - New Glow Plug Bore Reamer Available
PIT52692023-12-04. Service bulletin. ELECTRICAL SYSTEM. CD Track Changes Unwanted When Rear Seat Audio Control Is Used To Change XM Station.
PIT5264B2023-12-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Canadian Customers Unable To Place Calls And Turn By Turn Inoperative In The United States.
PIT52642023-12-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Canadian Customers Unable To Place Calls In The United States
PIT5236B2023-12-04. Service bulletin. ELECTRICAL SYSTEM. OnStar Module Does Not Support All B101D Symptom Codes.
PIT52152023-12-04. Service bulletin. SEATS. GM Accessory Heated Seats Inoperative After Installation.
PIT52142023-12-04. Service bulletin. SUSPENSION. GM TAC Support of Vehicle Vibration Complaints.
122522023-12-04. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION. Rear Vision Camera Guideline Feature Not Working
12050B2023-12-04. Service bulletin. SUSPENSION. Rear Axle Grinding Noise, Vibration - Inspect Rear Axle
1308116001A2023-12-04. Service bulletin. EQUIPMENT:ELECTRICAL. Aftermarket ALDL or DLC Interface Devices Causing Multiple Issues
120601008A2023-12-04. Service bulletin. UNKNOWN OR OTHER; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Unnecessary Flushing Services, Additive Recommendations and Proper Utilization of GM Goodwrench Maintenance Schedule to Enhance Customer Service Experience
1206010082023-12-04. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; UNKNOWN OR OTHER. Unnecessary Flushing Services, Additive Recommendations and Proper Utilization of GM Goodwrench Maintenance Schedule to Enhance Customer Service Experience
120601007A2023-12-04. Service bulletin. ELECTRICAL SYSTEM:PROPULSION SYSTEM; ENGINE; UNKNOWN OR OTHER. New Service Cam Bearings For Gen IV V8 Engines
120421001B2023-12-04. Service bulletin. STRUCTURE; UNKNOWN OR OTHER. Transfer Case Identification First Design vs. Second Design
1203100032023-12-04. Service bulletin. WHEELS:LUGS/NUTS/BOLTS/STUDS; SUSPENSION; TIRES; WHEELS; UNKNOWN OR OTHER. Diagnostic Tips for Difficult to Resolve Tire/Wheel Vibration Concerns
120310002A2023-12-04. Service bulletin. WHEELS; TIRES; UNKNOWN OR OTHER; WHEELS:LUGS/NUTS/BOLTS/STUDS. Proper Wheel Installation and Wheel Torque Techniques
1203100022023-12-04. Service bulletin. WHEELS:LUGS/NUTS/BOLTS/STUDS; UNKNOWN OR OTHER; TIRES; WHEELS. Proper Wheel Installation and Wheel Torque Techniques
120310001B2023-12-04. Service bulletin. TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS; SUSPENSION; WHEELS. Vibration Shortly After Tires are Mounted/Preventing Vibration from Wheel Slip

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.