WenmarOpen by Wenmar Pro

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

Only bulletins with component: Suspension are shown. Show all

Bulletins, newest first
PIT54032017-08-15. Service bulletin. SUSPENSION. This Preliminary Information communication provides information to the technician with the steps to diagnosis and repair vehicles with various handling, vehicle dynamics concerns, noises from the suspension or underbody, or issues related to damaged suspension components. Before any in-depth diagnostics are performed, be aware that various issues could occur if the vehicle has been modified and inform the customer the conditions noted may not be covered under warranty. Technician will inspect for installed aftermarket suspension components. Also inspect for improperly adjusted torsion bars.
PIT5403A2017-08-15. Service bulletin. SUSPENSION. This Preliminary Information communication provides information to the technician with the steps to diagnosis and repair vehicles with various handling, vehicle dynamics concerns, noises from the suspension or underbody, or issues related to damaged suspension components. Before any in-depth diagnostics are performed, be aware that various issues could occur if the vehicle has been modified and inform the customer the conditions noted may not be covered under warranty. Technician will inspect for installed aftermarket suspension components. Also inspect for improperly adjusted torsion bars.
06-03-09-004G2017-08-15. Service bulletin. SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY. This technical bulletin adds the 2016 model year to repair information for lubricating the rear leaf springs to correct a customer concern for a squeak noise from rear of vehicle.
09-03-09-001C2017-08-15. Service bulletin. SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY; SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY; SUSPENSION. This technical bulletin provides repair information for the re-torque of leaf spring bolts to correct a customer concern for a clunking noise coming from the rear of the vehicle.
09-03-09-001B2017-08-15. Service bulletin. SUSPENSION; SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY; SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY. This technical bulletin provides repair information for the re-torque of leaf spring bolts to correct a customer concern for a clunking noise coming from the rear of the vehicle.
PIT5049C2017-08-15. Service bulletin. SUSPENSION:FRONT. This Preliminary Information communication provides information to the technician on the steps to help diagnose and repair vehicles with a rattle, squeak, clunk, thump, or bump. If published Service Information diagnostics do not lead to a repair for the concern. Technician should inspect the opposite side shock/strut for the cause of the concern.
PIT3078F2017-08-15. Service bulletin. WHEELS:HUB; SUSPENSION:FRONT:HUB. This Preliminary Information communication provides information to the technician about vehicles that have grease leaking from front hub bearings. Technician should not replace the bearing for grease purge. Technician should be advised to not clean the purged grease from the area immediately on or adjacent to the seals because this grease provides additional protection. Technician should only replace the bearing if the seals show visible damage, bearing endplay is greater than 0.005" or 0.13mm, bearing exhibits rough rotation, or bearing exhibits abnormal noise.
05-03-08-002H2017-08-15. Service bulletin. SUSPENSION:FRONT:SHOCK ABSORBER. This informational bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
06-03-09-004H2017-07-18. Service bulletin. SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY. This technical bulletin provides a procedure to lube the rear leaf springs on vehicles with the condition of a squeak noise originating from the rear of the vehicle.
14520A2017-02-03. Service bulletin. SUSPENSION. 14520A - SPECIAL COVERAGE (REVISED TO INCLUDE 2007, AND 2010-2013 MODEL YEAR CHEVROLET SILVERADO AND GMC SIERRA LIGHT DUTY TRUCKS, ALONG WITH EXPANDING COVERAGE TO CERTAIN U.S. STATES). SOME 2008-2009 MODEL YEAR CHEVROLET SILVERADO AND GMC SIERRA LIGHT-DUTY VEHICLES REGISTERED IN CANADA OR 2007, AND 2010-2013 MODEL YEAR CHEVROLET SILVERADO AND GMC SIERRA LIGHT DUTY VEHICLES REGISTERED IN OR PREVIOUSLY REGISTERED IN MAINE, NEW HAMPSHIRE, NEW YORK, AND VERMONT OR IN THE CANADIAN PROVINCES NEW BRUNSWICK, NEWFOUNDLAND, NOVA SCOTIA, PRINCE EDWARD ISLAND, ONTARIO, AND QUEBEC MAY DEVELOP A FRACTURED MIDDLE-LEAF SPRING IN THE THREE-LEAF REAR-SUSPENSION SPRING ASSEMBLY, FORWARD OR REARWARD OF THE JOINT TO THE REAR AXLE. THIS CONDITION MAY RESULT IN NOISE, RIDE-HEIGHT DIFFERENCE, CONTACT WITH A REAR TIRE, AND/OR DAMAGE TO OTHER COMPONENTS UNDER THE VEHICLE. VEHICLES WITH THIS CONDITION WILL HAVE REDUCED LOAD-CARRYING CAPACITY. IF THE CONDITION OCCURS WITHIN THE TERM LIMITS, DEALERS WILL REPLACE THE REAR SPRINGS.
12050C2017-01-31. Service bulletin. SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY. 12050C - CUSTOMER SATISFACTION PROGRAM (REVISED EXPIRATION DATE, EXTENDED TO 4/30/16). CERTAIN 2011-2012 MODEL YEAR CHEVROLET EXPRESS AND GMC SAVANA VEHICLES, AND CHEVROLET SILVERADO AND SUBURBAN, AND GMC SIERRA AND YUKON XL 2500 SERIES 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 LEAK COULD DEVELOP. IF ENOUGH FLUID WERE TO LEAK OUT, THE DRIVER MAY HEAR INCREASING NOISE, ADDITIONAL VEHICLE VIBRATION, AND SMELL BURNT AXLE LUBRICANT. IF THE DRIVER IGNORES THESE WARNINGS AND CONTINUES TO DRIVE THE VEHICLE, A SLOW LOSS OF VEHICLE MOTION COULD OCCUR. DEALERS ARE TO INSPECT AND, IF NECESSARY, REPAIR THE REAR AXLE.
100310001A2016-11-30. Service bulletin. WHEELS; SUSPENSION. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION ON HOW TO PROPERLY MOUNT AND BALANCE WHEELS AND TIRES ON HEAVY DUTY TRUCK MODELS ONLY
PIT5403B2016-10-21. Service bulletin. SUSPENSION. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN WITH THE STEPS TO DIAGNOSIS AND REPAIR VEHICLES WITH VARIOUS HANDLING, VEHICLE DYNAMICS CONCERNS, NOISES FROM THE SUSPENSION OR UNDERBODY, OR ISSUES RELATED TO DAMAGED SUSPENSION COMPONENTS. BEFORE ANY IN-DEPTH DIAGNOSTICS ARE PERFORMED, BE AWARE THAT VARIOUS ISSUES COULD OCCUR IF THE VEHICLE HAS BEEN MODIFIED AND INFORM THE CUSTOMER THE CONDITIONS NOTED MAY NOT BE COVERED UNDER WARRANTY. TECHNICIAN WILL INSPECT FOR INSTALLED AFTERMARKET SUSPENSION COMPONENTS. ALSO INSPECT FOR IMPROPERLY ADJUSTED TORSION BARS.
SB-09-03-09-001D2016-08-08. Service bulletin. SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY; SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE. THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO RE-TORQUE THE JOINTS OF THE REAR LEAF SPRING ASSEMBLY TO CORRECT A CUSTOMER CONCERN OF A CLUNKING NOISE COMING FROM THE REAR OF THE VEHICLE.
SB-PIP-4995-A2016-06-17. Service bulletin. SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-00001906992016-03-31. Service bulletin. SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
PB-120502012-05-23. Service bulletin. SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY. CHEVROLET/GMC: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON SOME 2011-2012 TRUCKS, A GRINDING NOISE AND VIBRATION WOULD BE NOTICEABLE DUE TO THE REAR AXLE RIGHT HAND SIDE BEARING ADJUSTER CLIP AND BOLT MAY COME LOOSE INSIDE OF REAR AXLE. *PE UPDATED 9/6/12. *PE UPDATED 7/18/14. *PE UPDATED 11/6/15. *PE
PIP-49952012-04-13. Service bulletin. SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY. GMC/CHEVROLET: DUE TO A POSSIBLE CRACKED OR BROKEN, THE HUB RETAINING NUT, THE REAR AXLE MAY LEAK FLUID. *PE MODELS 2011-2012 SILVERADO HD 2500 AND 3500, SIERRA HD 2500 AND 3500. UPDATED 11/28/12. *PE
SB-09-03-09-0012009-11-30. Service bulletin. SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY; SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:LEAF. 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. *KB

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