2019 GMC TERRAIN Complaints

my vacuum booster pump for my brakes keeps needing to be replaced. i had to get it replaced twice now & every single time that it stopped working i was driving on the highway at 65 mph and my brakes just suddenly wouldn’t work and we’re very hard to push down. this has happened twice now

When I place the vehicle in reverse, my backup camera is not working, resulting in a blue screen with a message to have the camera serviced. Per the GMC dealership, this is a common problem with many of the newer GM vehicles and is a safety item due to not having a clear view of what is behind me. I purchased this safety feature and it not working.

We were in the driveway thru lane at a fast food restaurant and all of a sudden the car shut off and the brakes got hard to push in. The car was able to be started at this time but the engine wasn’t working well. We were able to make it home, slowly and carefully. We had the vehicle towed to a Mechanic and this is what was told to us: Possible increased brake pedal effort due to mechanical engine vacuum pump failure. We had it sent to David's Auto Service 219-861-0666. This could’ve been a very dangerous accident if we were driving on the expressway or on a regular street going the normal speed limit. Thankfully we were in a drive thru lane.

After driving down around 40 miles, the brakes failed when pulling into a parking spot. There was no indication that the brakes were having issues. No sounds or vibrations were felt. I stopped at a stoplight before turning into the parking lot. Then when attempting to spot in a parking spot, the brakes were very difficult to press. Luckily there was not a vehicle or person in front of me. Had the vehicle taken to a dealer and was told it was the vacuum booster that failed. Upon researching, this has been an issue in past GMC models, but I was told there was no current recall for the vehicle. The vacuum booster was replaced for $540 and I drove the vehicle home. The vehicle showed no issues for the first day. On the second day, I went to pull into a parking spot at a park and the same issue with the brakes occurred. I nearly struck a child that was walking in front of the parking spot. Luckily I was able to slam the pedal to the floor and come to a stop. Took the vehicle to the mechanic and was told the same part had broke. That part has been fixed again and has been fine for 2 days so far. I'm scared that it will happen again and I will not be able to stop in time before I hurt someone else or my family. This needs to be addressed. And I believe I am owed compensation from the manufacturer.

Our son and two daughters were driving on the highway at approximately 70mph when a message came up to say the engine was in "Reduced Engine Power". Although nothing seemed to change. The instruction for such and error message is to "get vehicle to a dealership within the next day." So they slowed to 60mph and continued on their way. About 8-10 minutes later another message popped up that said "Service Brake Assist", at which point they immediately tested the brakes and they worked. But 2-5 minutes later they tested the brakes again and the brakes had completely failed! Zero brakes on the highway! No matter how hard the driver pushed the brake pedal there was 0.0% response. So luckily they were able to coast down to about 10 mph with hazard lights on. But at that point they lost everything. No power steering, no engine, and zero brakes. Thank the lord that they were able to have enough room to slow down and get over to a shoulder prior to the loss of power steering and that they had enough room to coast to a stop. Please help, as we were extraordinarily lucky that day that 3 of our children were able to walk away from such a catastrophic vehicle failure. I just do not want that to happen to anyone else.

Transmission slips from cold start No. Have not taken to Dealer No. No. Warning lights or messages

The car failed to shift into gear. Message displayed, "transmission unable to shift" ,"2 gears selected " or "service transmission". Issued started in June 2022 while in drive thru line, when shifting from park to move the car would not shift. Had to turn car off for about 10 minutes and car was able to shift and drive normal. Check engine light came on about a week later and had checked for code p07b5. A couple of days later, light went back off. About 3 days later getting ready to leave home and car would not shift into gear again but turn car off and back on a couple of times and car shifted and drove normal. On July 13 2022 was driving in traffic and message displayed, unable to shift and service transmission. When I changed lanes and released the gas petal, the car went into park, stopped, and set the parking brakes, but did not turn off, jerking me forward and throwing things around in the car. Cars behind me had to slam on brakes to keep from hitting me because there was no initial brake light. I put on the flashers and turned the car off. Parking brake was stuck so I pressed it about 5 times before it finally released. I restarted the car 3 times and it finally shifted and drove as normal. I called gm to inquiry about a recall and was told there were none. I called for a diagnostic test and schedule is in about 2 weeks. The car has not been inspected by anyone listed above?8

The contact's wife owns a 2019 GMC Terrain. The contact stated that upon making a left turn, the steering wheel would forcefully jerk to right, thrusting the vehicle into the opposite direction. The contact stated that the service ESC and service brake assist warning lights were illuminated. The warning lights would disappear soon after the failure as well as upon restart. The contact had taken the vehicle to the dealer on multiple occasions where he was repeatedly informed that unless the service light was illuminated upon arrival to the dealer, they would be unable to service the vehicle. The vehicle remained in the possession of the dealer and was not repaired. The manufacturer had yet to be notified of the failure. The failure mileage was unknown.

The contact owns a 2019 GMC Terrain. The contact stated while approaching an intersection, he depressed the brake pedal to the floor however, the vehicle failed to stop immediately. The contact stated no warning light was illuminated. The contact stated that the brake assist activated and stopped the vehicle. The contact was able to continue driving to his residence at a slower speed. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the vacuum pump to be replaced. The vehicle was not repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 84,400.

A COUPLE WEEKS AGO I GOT IN MY 2019 GMC TERRAIN AND SHIFTED INTO REVERSE AND MY BACK-UP CAMERA WAS NOT WORKING. IT WAS A BLUE SCREEN THAT SAID "SERVICE REAR VISION SYSTEM". A COUPLE DAYS LATER IT STARTED WORKING AGAIN. MY CAR SAT FOR A WK AND I GOT IN IT ON MAY 28 TO HELP MY DAUGHTER MOVE AND IT WASN'T WORKING AGAIN. THIS IS A SERIOUS SAFETY ISSUE NOT ONLY TO ME, BUT TO ANYONE (LIKE MY GRANDKIDS) OR ANYTHING BEHIND MY CAR AS I'M BACKING UP, ESPECIALLY IF I CANNOT SEE THEM.