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Service bulletins for the 2026 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.

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

By type

By component

By trouble code

Bulletins, newest first
PIP6101A2026-03-03. Service bulletin. UNKNOWN OR OTHER. The document makes technicians aware of a valvetrain tick noise that is created by one or more soft hydraulic valve lash adjusters. The soft lash adjuster concern is due to debris from the valve rocker arm, entering into the lash adjuster. The document instructs the technician to replace all of the lash adjusters and rocker arms in the entire engine if any soft lash adjusters are found.
N2525363902026-02-25. Service campaign. UNKNOWN OR OTHER. Certain vehicles, equipped with Snowplow Prep Package RPO VYU, may be missing an accessory harness. Dealers are to include the Auxiliary Wiring Harness in the accessory pack for vehicles in dealer stock. Vehicles NOT in dealer stock will have the Harness installed by the dealer.
PIT6415A2026-02-23. Service bulletin. UNKNOWN OR OTHER. PI to explain normal operation for a concern that the outside rearview mirrors may not fold when the doors are locked, due to the personalization settings for Auto Door Unlocking.
PIT6300B2026-02-23. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technician on the a potential cause for Buzz/rattle/vibration from the passenger side when the vehicle is under light load, with a 3.0L LZ0 Engine.
PIT6456D2026-02-23. Service bulletin. UNKNOWN OR OTHER. This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
PIT64852026-02-23. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates that the Tailgate Assist Handle is not included with certain truck models and how to get one if needed.
PIT6394C2026-02-23. Service bulletin. UNKNOWN OR OTHER. A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar learn procedure to complete. Tech is directed to drive a city route to complete the procedure.
PIT6436B2026-02-23. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information is to inform dealer technicians to not replace anything at this time in regards to this concern. The vehicle is still safe to drive with no other issues.
PIT6213D2026-02-23. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates that the Tailgate Assist Handle is not included with certain truck models and how to get one if needed.
PIT4506J2026-02-23. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information communication provides information to the technician that some owners of Heavy Duty Trucks and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride characteristics of the truck and should not be lowered.
PIP5865L2026-02-18. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates the possibility of DTC P30BF failing on low mile vehicles due to the possibility of the cylinder 1/2 sliding barrel binding on intake camshaft.
PIT6120C2026-02-18. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates information to direct to GM Upfitter bulletin 193 or 205 depending on trim level for installation instructions for the 9L7 Upfitter Switches.
N2525365602026-02-16. Service campaign. UNKNOWN OR OTHER. Certain vehicles may experience water intrusion due to a hole in the cabin Pressure Relief Valve. Dealers are to seal the hole using RTV sealant.
N252521591-032026-02-11. Service campaign. UNKNOWN OR OTHER. Certain vehicles listed above may have a condition in which hard braking may unexpectedly engage. Dealers will re-program the IPM or Front View Camera depending on what the vehicle is equipped with.
PIP61012026-02-11. Service bulletin. UNKNOWN OR OTHER. The document makes technicians aware of a valvetrain tick noise that is created by one or more soft lifters. The soft lifter concern is due to manufacturing debris within the lifter when it was manufactured. The document instructs the technician to replace the soft lifter(s) and the rocker arm it operates.
PIT6452C2026-02-11. Service bulletin. UNKNOWN OR OTHER. This is a diagnostic PI to assist on a repair to fix a concern for the HVAC temperature doors binding at times
PIC6602R2026-02-11. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
PIT6456C2026-02-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
N252521591-022026-02-10. Service campaign. UNKNOWN OR OTHER. Certain vehicles listed above may have a condition in which hard braking may unexpectedly engage. Dealers will reprogram the Image Processing Module.
N2525370302026-02-10. Service campaign. UNKNOWN OR OTHER. Certain vehicles listed above, may have a condition where the trailer hitch label understates hitch capability. Dealers will remove the sticker on trailer hitch.
PIT6467A2026-02-09. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates that this concern is being root caused and no repairs should be attempted at this time
PIC66382026-02-01. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technician the repair direction needed to address an inaccurate speed limit sign displayed on instrument cluster.
PIC6638A2026-02-01. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technician the repair direction needed to address an inaccurate speed limit sign displayed on instrument cluster.
PIP5865K2026-02-01. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates the possibility of DTC P30BF failing on low mile vehicles due to the possibility of the cylinder 1/2 sliding barrel binding on intake camshaft.
PIP6099A2026-02-01. Service bulletin. UNKNOWN OR OTHER. This P/I is advising that the TCM should not be replaced for DTC P16F4 and to follow the repair instructions.

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