2021 GMC Terrain problems
NHTSA has received 55 complaints about the 2021 GMC Terrain, and 22% of them involve engine. After that come brakes (15%) and drivetrain & axles (15%).
At a glance
- Complaints
- 55 filed with NHTSA
- Most reported
- Engine 22% of complaints
- Crashes and fires
- 6 and 0
- Injuries and deaths
- 4 and 0
Source: NHTSA owner complaints
Where the complaints are
Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.
What the data shows
Safety-related details: 6 complaints mention a crash; 4 injuries reported.
Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2021 ranks 15th most-complained-about out of 17 model years of the GMC Terrain with enough data (55 complaints in that window). It is also covered by 2 safety recall campaigns.
What owners wrote
A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.
I was going to my sons home which is located on a steep dowhill street with several turns, one of ther almost 90 degrees.as I started to desend the hill and gain speed, I depressed the foot brake. It did not respond at all. As I continued to gain speed and coming up on the sharp curve, I continued to pump and apply brake . The brakes did not work. I continued to gain speed and go around 2 other turns.
I was in a in a 70 miles an hour highway accident and was hit in front driver side door, went up embankment and hit a tree then rolled backwards onto the highway. No airbags deployed.
The contact owned a 2021 GMC Terrain. The contact stated while the brake pedal was depressed, it was released and the vehicle suddenly accelerated aggressively. The contact attempted to avoid crashing into the vehicle in front and swerved however the front of the vehicle still impacted the vehicle in front. The air bags deployed upon impact. A police report was filed. The contact stated no medical attention was provided, but did suffer bruises from the air bag and seat belt.
The contact owns a 2021 GMC Terrain. The contact stated while driving 5 MPH, the vehicle stalled. There was no warning light illuminated. The contact stated that the failure was like GM Product Safety Recall: N222372310 (Inadequate Fuel Pump Flow). The vehicle was towed to an independent mechanic, who determined that the fuel pump had malfunctioned and damaged the camshaft. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted.
The contact owns a 2021 GMC Terrain. The contact stated while driving at various speeds, the transmission erroneously shifted to the neutral, causing the vehicle to decelerate. After restarting the vehicle, the vehicle operated normally. During the failure, the message " Power Reduced" was displayed. The cause of the failure was not yet determined. The local dealer was notified of the failure. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was 36,000.