GMC Terrain owners have reported 341 electrical system related problems since 1996. Table 1 shows the 25 most common electrical system problems. The number one most common problem is related to the vehicle's electrical system (297 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.
Onstar module not working 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...
Tl the contact owns a 2014 GMC Terrain. While driving 30 mph, the horn failed to work. The dealer (penske Cadillac of south bay, 18600 south hawthorne blvd, torrance, CA 90504) diagnosed that the fuse was blown due to a short. The vehicle was repaired. Read details...
The contact owns a 2015 GMC Terrain. While driving 30 mph, the low beam headlights failed to fully illuminate. The failure occurred without warning. The vehicle was taken to the dealer, but was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 300. Read details...