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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: Seats are shown. Show all

Bulletins, newest first
24-NA-2392025-01-30. Service bulletin. ELECTRICAL SYSTEM; SEATS; STRUCTURE:BODY; STEERING; ENGINE. This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.
06-00-89-029V2024-05-16. Service bulletin. SEATS; UNKNOWN OR OTHER. This service bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
24-NA-0542024-03-20. Service bulletin. EQUIPMENT; STEERING; SEATS; ELECTRICAL SYSTEM. This service bulletin provides information on No Heated Seats or Heated Steering Wheel During Remote Start.
21-NA-1222024-02-14. Service bulletin. SEATS; ENGINE AND ENGINE COOLING; STEERING. This technical bulletin provides a procedure to replace the radiator brackets if found loose to correct a customer concern of excessive vibration in the steering wheel or seat or floor at idle or at low to moderate speeds.
23-NA-0462024-02-06. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; STRUCTURE; ELECTRICAL SYSTEM; SEATS. This service bulletin provides a procedure to check for water intrusion at the door electrical connectors and repair the wiring if found the cause of customer concerns of Power Windows and/or Mirrors Inoperative, Power Seat Movement Inoperative and/or Moving On Its Own, Side Object Detection Inoperative and/or Unwanted Activation, Power Door Lock Cycle Inoperative, Keyless Entry Inoperative.
21-NA-1222023-04-14. Service bulletin. SEATS; ENGINE AND ENGINE COOLING; STEERING. This technical bulletin provides a procedure to replace the radiator brackets if found loose to correct a customer concern of excessive vibration in the steering wheel or seat or floor at idle or at low to moderate speeds.

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