2018 GMC TERRAIN Complaints

Radio, hands free calling, and light on mirror shorting out. None of them work. It’s like it has a short in the wiring.

6/3/22 I went to the grocery store which is on a four lane road. When I left the store I had no brakes. On a four lane stop and go road. The was no warning just nothing peddle to the floor and now check engine light is on. I am reading this same problem repeatedly. I love this car but this is a serious hazard and needs to be addressed. We are all driving around practically rear ending people. I was an inch from the guy in front of me thank God the light changed as I was coming up on him or I would have hit him.

I was driving out of town (2 hrs from home) with my 2 small children and my mother, when I tried to slow to come to a stop my breaks did not work and I almost rear ended someone. It was sudden, there were no signs that my breaks were going to mess up. When I tried to look up recalls, there were none for my vehicle BUT there were MANY statements of people who drove gmc or gm vehicles that had the same issue with the vacuum boost for the brakes around 50k miles where the breaks just quit or were hard to use. It seems to be a common issue and is VERY unsafe. I cannot afford to fix the issue and I don't feel as though I should have to if other terrains have been recalled, except mine which I do not understand.

Started car in parking lot. Warning came on saying “service safety restraint system” and airbag illumination was on. Just notified salesman as I have only had this vehicle about 10 days. Bought it used. Unfortunately.

My driver seat does not raise or incline so it gives me like a visibility when I’m driving. The seat needs to be raised so I have more visibility on the road while I’m driving.

When you're sitting at idle in gear and go to accelerate the transmission will slip out of gear into neutral then into gear after the rpms climb. This happens alot. According to the dealership this is normal based on information from a bulletin from GMC.

1. 2018 Terrain would not start in a parking lot. Remote was used after several attempts to start with push button failed, and after a slight hesitation , engine started. Vehicle was driven about 6 miles without incident. 2. Vehicle was driven about 10 miles the next day and start/stop engaged at a stop light but would not restart. After about 3 minutes of cycling throught the starting procedure, the vehicle started. Drove another 8 miles without incident. 3. Next morning, drove about 3 miles to intersection where start/stop engaged but would not restart. After about 30 minutes of cycling through starting procedure and an attempt to jump start was made the vehicle restarted. At this point, the vehicle was taken to Romain GMC for service. A new battery was installed and other related operations.After about 10-15 miles, the vehicle would not start. Remote was attempted but it would not start. After about an hour, vehicle started and was driven back to Romain avoiding the stop/ start engagement.

The contact owns a 2018 GMC Terrain. The contact stated that while driving, the seat belt restraint warning light illuminated continuously while the driver’s and passenger’s seat belts were fastened. The dealer was informed of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 21,700.

The contact owns a 2018 GMC Terrain. The contact stated that while her husband was driving 50 MPH, the brake pedal was depressed and went to the floorboard. The service brake assist warning light was illuminated. The vehicle was not taken to a dealer nor independent mechanic to be diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 69,000.

The brakes are extremely hard to engage while driving. All 4 rotors are pitted with less than 30k miles. Doing some online research this is a common problem and should be addressed. I just did my first set of brakes at 100,000 miles on my truck.