Table 1 shows two common service brakes related problems of the 2020 GMC Terrain. The number one most common problem is related to the service brakes (66 problems). The second most common problem is related to the brakes failed (one problem).
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems | |
| Brakes Failed problems |
On June 7, 2026, I was driving my 2020 GMC Terrain. I was going at about 40mph along a very busy main road. While slowing for a red light the check engine light turned on and the car displayed a notice about reduced engine power. Read details...
When reversing out of a parking spot, brakes failed causing accident. Multiple attempts to depress brake pedal with no braking. Hit a parked car. After shutting car off and attempting to move vehicle brakes did engage and respond correctly. Rear damage to Terrain occurred requiring towing. Read details...