Eight problems related to body have been reported for the 2015 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 GMC Terrain based on all problems reported for the 2015 Terrain.
2015 GMC Terrain sle awd. SUV was taking in for oil change found excessive rust on frame under all four doors. On both sides rust and holes near the front of both rear wheels. I believe its called the "rocker" I'm unsure. I bought the car at a little over 71,000 miles in 2022-2023 now just getting to 94,000 in February 2026. If there was rust which there probably was the car should have not been sold if the rust was enough to cause problem later on. I may need to go purchase a new car while still owe some money in the car loan. Rust and hole in the rear control arm. The amount to replace and repair all the parts with labor exceeds current value.
First occurrence in September 2015. Rear lift gate acted abnormally, when I was parked,y son opened the lift gate using the normal door handle button, it raised, but as he was loading it lowered onto him. He is small, I had to get out and pull it off of him, it went up and down a couple times and then closed. You cannot stop it from closing down on you if you are trying to load or unload into that compartment. We have had to stop using altogether.
While pulling into a parking spot very slow the vehicle accelerated and damaged car in front there are traction marks showing the sudden acceleration. The car would not stop until the ignition was turned off. Because the cars in front were hit I placed the car in park after the ignition was turned off.
The rear hatch will fully open and then falls part way or fully without any cause. It hit me in the head and back as I was not expecting the hatch door to fall. This was obviously while the car was parked in a garage.
There is water leaking (possibly from the air conditioner) onto the floorboard of the front passenger side. This has caused mold to form and grow in the carpeting. It is constant and is getting worse.
Tl-the contact owns a 2015 GMC Terrain. The contact stated that their lift gate lifted on it's own. The lift gate then dropped and hit the contact's spouse. Then the lift gate lifted again. Then the contact's spouse had to hold the life gate before it struck their daughter. Finally, the lift gate closed on it's own. The contact scheduled to take the vehicle to be diagnosed next week at johnson motors 1891 blinker pkwy, dubois, PA 15801(877) 816-0659. The contact planned to repair the vehicle after the vehicle is diagnosed. The manufacturer was made aware of the failure. No assistance was provided. The failure mileage was 48,000. Jw.
Front passenger seat belt chime comes on when there is nothing on the front seat or almost nothing on the seat. This has happened at least 1/2 dozen times or more. I can be driving and all of sudden comes on. It can scare one esp 1st time. You don't know what is happening. I thought I blew a tire or door came open. My attention was everywhere but on 65 mph traffic on freeway. Breaks one's driving concentration. Independent of temperature. Other problem I have is lots of wind comes in on passenger door. It is not aligned properly. Gm has tried a couple of times with no success. Very annoying and hard to hear radio etc. . 3rd problem is navigation,communication center,it keeps disappearing. It is giving me directions somewhere and then just disappears and resets. It has been replaced once. It has gotten me stranded more than once. I am a senior who relies on system. When it disappears, I am not always somewhere that I can stop to completely reset and reenter all the information again. I feel that this is a safety issue. I was on hwy every time and most of the time not in a remote area but not in area that I could stop. In CA. There are many areas you do not want to get off the frwy at. All instances above happened in the city areas while driving. Service was done oct 2015. None of issues resolved despite attempt. All are ongoing.
In the early morning of 9-5-15 my daughter began driving home from pittsburgh to DE. She swerved to avoid an animal on the PA turnpike, hit the jersey wall on the right, rolled over completely twice to the left, landing upright in the median. Luckily the seat belt saved her and she had only minor injuries. However the side air bags did not deploy. In fact onstar called 911 because their monitoring equipment showed that the air bags had deployed, but they did not. The vehicle was declared a total loss. There is no recall on this vehicle for airbag problem though I've heard that there should be so I wanted to report this.