GMC Common Troubles, Codes & Safety Recalls
Troubleshoot active dashboard warning lights and check engine codes on your GMC. Read verified safety bulletins and locate replacement parts.
Models Covered
Select your model to see specific issues, recalls, and wiring layouts:
NHTSA Safety Recalls
20V668000 2020 GMC TERRAIN - POWER TRAIN:AUTOMATIC TRANSMISSION
Summary: General Motors LLC (GM) is recalling certain 2018-2019 Chevrolet Cruze and Buick LaCrosse, 2018-2020 Chevrolet Equinox, Chevrolet Traverse and GMC Terrain, 2018 Chevrolet Malibu, 2019-2020 Buick Encore, Buick Enclave, Cadillac XT4, Chevrolet Blazer and GMC Acadia, and 2020 Cadillac XT6 vehicles. The start/stop accumulator endcap may have missing bolts.
Remedy: GM will notify owners, and dealers will inspect the start-stop transmission accumulator and replace it if any bolts are missing, free of charge. The recall began December 15, 2020. Owners may contact GMC customer service at 1-888-988-7267, Buick Customer service at 1-866-608-8080, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-458-8006. GM's number for this recall is N202313440.
23V339000 2020 GMC TERRAIN - CHILD SEAT:VEHICLE LATCH ANCHOR
Summary: General Motors, LLC (GM) is recalling certain 2020-2023 Chevrolet Equinox and GMC Terrain vehicles. The four rear-seat lower child seat LATCH anchorage bars may have excessive powder coating, which could prevent a child seat from being installed with the anchorage bars. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 225, "Child Restraint Anchorage Systems."
Remedy: Owners are advised to install child seats using the vehicle's rear seat belts until the remedy is complete. Dealers will inspect the latch anchorage bars, and remove and replace the finish, as necessary, free of charge. Owner notification letters were mailed June 2, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232403240.
Frequently Asked Questions
What are the most common trouble codes on GMC vehicles?
Common codes include powertrain lean issues (P0171), cylinder misfires (P0300), and catalyst degradation (P0420).
How do I check for safety recalls on my GMC?
You can search by your vehicle's 17-digit VIN on the official NHTSA recalls search website or consult our make/model listings.
Are recall repairs free at a GMC dealer?
Yes, all safety recalls ordered by the NHTSA are legally required to be repaired free of charge by authorized dealership technicians.