*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Fuel/propulsion system
The transmission was jerking and when the heat is running it smells like itâs bout to catch fire
Oct 2, 2026Structure › Body
Tailgate lifts by itself
Oct 6, 2026Engine
I am submitting this complaint regarding the engine timing chain failure in my 2015 GMC Terrain because I believe it presents a serious safety hazard. Before the failure, the vehicle began experiencing intermittent symptoms, including engine jerking, shaking, rough operation, abnormal engine noises, and an intermittent check engine light. While driving on the highway, the engine timing chain failed, causing the vehicle to suddenly lose power. I was traveling at highway speed and had to safely maneuver the vehicle out of traffic. The unexpected loss of power placed me and other motorists at risk of a collision because I could no longer safely maintain the flow of traffic. The vehicle was…
May 18, 2026Service brakes, hydraulic
The contact owns a 2015 GMC Terrain. The contact stated that while driving 5 MPH, the brake, ABS, and stabili-trak warning lights were illuminated. The dealer was contacted and diagnosed the vehicle with an Electronic Brake Control Module failure. The dealer stated that the manufacturer no longer manufactured parts to repair the vehicle. The manufacturer was not made aware of the issue. The failure mileage was approximately 167,446.
Jul 10, 2026 · 167,446 milesAir bagsCrash
I hit a deer and it totaled my vehicle and the Airbags did not deploy
May 22, 2026Engine and engine cooling
See attached document for complaint.
Jan 6, 2026Engine and engine cooling
The contact owns a 2015 GMC Terrain. The contact stated that while driving approximately 40 MPH, there was an abnormal rattling sound coming from the engine compartment. The vehicle was taken to the residence. The contact stated that when the vehicle was started the following day, the rattling sound from the engine compartment returned. The vehicle was taken to a dealer on several occasions, and it was diagnosed and determined that the engine was low on oil and was consuming 2 quarts of engine oil every 2-3 weeks. The contact stated that the oil level was topped off. The manufacturer was notified of the failure. The failure mileage was approximately 94,000.
Dec 20, 2025 · 94,000 milesEngine
Oil consumption, causing high pressure furl pump to clog. It also causes catalytic converter to clog. No warning of oil loss. Causing stalling out while driving. Caused the engine to seize. New engine replaced and still same problem s
Mar 27, 2026
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.