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Service bulletins for the 2021 GMC Terrain

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Air bags are shown. Show all

Bulletins, newest first
22-NA-1702023-10-10. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS; EXTERIOR LIGHTING. This bulletin offers Information on Possible Crank No Start or Extended Crank with DTC P12A6 or Service Safety Restraints message on DIC, with B0073.
PIT59942023-04-17. Service bulletin. AIR BAGS; POWER TRAIN. This Preliminary information communication provides information to the technician with diagnostic tips for diagnosing reduced or low engine power with no Driver Information Center messages, that may be caused by an inaccurate brake pedal position sensor.
22-NA-1702022-10-07. Service bulletin. EXTERIOR LIGHTING; AIR BAGS; ELECTRICAL SYSTEM. This bulletin offers Information on Possible Crank No Start or Extended Crank with DTC P12A6 or Service Safety Restraints message on DIC, with B0073.
PIC5650J2021-09-13. Service bulletin. POWER TRAIN; AIR BAGS. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
N2023218402021-02-16. Service bulletin. AIR BAGS; POWER TRAIN; EXTERIOR LIGHTING. Service Update. On certain vehicles equipped with automatic transmissions, the clutch spring retaining ring may not be fully seated. Vehicles with this condition may set DTC Code P0747 and the MIL light (malfunction indicator light) will illuminate. This typically occurs at low mileage. Dealers will inspect the transmission by following the procedure and if it fails, the transmission will be replaced.

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