GMC Terrain owners have reported 353 electrical system related problems since 1996. Table 1 shows the 26 most common electrical system problems. The number one most common problem is related to the vehicle's electrical system (308 problems). The second most common problem is related to the vehicle's car will not start (8 problems). For details of each of the problem category, use the links in the table.
While driving on an interstate, vehicle became sluggish when accelerating. Took off on exit, engine was reduced to 50% power, attempted to drive to large parking lot, lost brakes, got the vehicle stopped in an intersection, would not shut off, go into neutral. Read details...
I was out of town and had gone to the store and when I got back in my vehicle and it would not start. After, letting it sit for 4 hours it finally cranked up. The battery and fuses were fine. No lights came in on my dash as a warning that something was wrong. This has happened to me before. Read details...
Wiring harness not weather sealed n shorted out after dealer washed car on delivery Read details...
The contact owns a 2017 GMC Terrain. The contact stated that on two separate occasions, the ignition key became stuck inside the ignition switch. The vehicle was towed to the local dealer who was unable to duplicate the failure. The cause of the failure was not determined. Read details...
We drove to a farm with a family of 5m kids and an elderly, and parked my car for 2-3 hours in the farm's open area parking lot. Vehicle showed no warning lights, no problems, no issues during our drive to the farm and prior to this trip. Everything was fine when we go there and parked. Read details...