2018 GMC Terrain

My vehicle’s engine was the component that failed. I was driving home from work. It is a forty-two minute commute. I was five minutes away from home when the vehicle slowed down in speed to a cruise. There were no issues prior after startup. There were no strange sounds, no start up issues, and no lights on the dashboard at all. I noticed that the vehicle had put itself into neutral gear. When I tried to stop the vehicle by hitting the break, the break did not work. I put my foot on the gas pedal and the car did not speed up. I could not change the gears. There was nothing I could do. The vehicle came to a complete stop when it powered off. When the car was put into accessory mode, there was an error message that stated the engine/vehicle was in low power mode. I was not able to start the car’s engine again. It was useless. The only way to move the car anywhere was to have it towed. This failure was scary and dangerous because it occurred in the middle of the night on a main road. Cars are known to drive above the speed limit past midnight in this area. I was glad that there were no cars on the road at the time. I was not aware of this failure occurring for my vehicle no were there any other known recalls. After doing some personal research, I found that GMC and certain Chevy models are having this problem, but no source listed any GMC Terrains as affected vehicles; although the same thing that happened to other people happened to me. I purchased an extended warranty through Fidelity Warranty Services, Inc. (Platinum) when I purchased the vehicle. They were the ones that had done all the necessary inspections for the filed claim once the vehicle was taken to a GMC Service center: Anderson Buick in Cockeysville, MD.

I was 30 seconds away to pull in my driveway. WARNING came up on screen (service) TRANSMISSION UNABLE TO SHIFT. When I turned into my driveway the vehicle stopped suddenly & threw itself into PARK. Vehicle still running but would not go into any gear, drive or reverse. I then pushed the PARK button & I think it said EMERGENCY BRAKE RELEASED. I then proceeded to drive up my driveway with no problem. Haven’t gotten back in vehicle yet as I am afraid to but l made appointment to take it to the dealership to check it out. On 3/24. (Linus Cadillac Buick GMC)Thank god it happened in my driveway as it would’ve caused an accident. ( the vehicle was driven up the Rd. walking distance. Sat there for an hr. Visiting my family. Then was driving home When incident happened. So it wasn’t running hot or anything.

My check engine light comes on intermittently, since March 2024, after having Cabin & Engine air filters replaced. Each time, I’m told it is code P0171. This has happened too many times for my comfort. Usually, it happens around the time my gas gets below 1/2 tank or after I fill up my gas tank. Originally, I was told by the mechanic that it could be one of four things, of which I’ve now had some of things done. InIn Aug. 2024, the check engine light came in. Code was P0171. Mechanic replaced the Brake vacuum pump. Once incident, almost a month later, on 9/24/24, was very scary. While driving on the interstate, I got ready to increase my speed, but heard a pop sound and noticed the speed wouldn’t accelerate. Next, the check engine light came on and the message in the dash popped up saying “engine power reduced” or something similar. I was able to coast from the fast lane over to the slower lane and off the highway into a parking lot. I turned the truck off. When I crunk it back up an hour later, it was shaking and jerking. While slowly driving, on the way to the mechanic shop, it jerked and shook each time I tried to accelerate after stopping at a light or slowing down with traffic. The code again was P0171. According to the mechanic, the intake hose had popped off. On 11/13/24, the check engine light came on. I again took it to have the code scanned and truck looked at. Test results again showed P0171. This time the Mass Air Flow Sensor was suggested. In a year I’ve had the fuel system cleaned twice, brake system flushed, & other routine maintenance such as oil change & brakes. Yet, my check engine light seems to still come on intermittently atleast once monthly. It came on two days ago, 2/18/25, when my gas was around 1/4 tank full. I added a fuel system injector, per mechanic suggestion, and filled my tank up with gas on today, 2/20/25. The check engine light had gone off within about 15 mins of me driving. I’m certain it will be back on soon with the same code.

Brake vacuum pump failed causing engine damage. Camshaft on national back order. Vehicle has been in repair shop for 1.5 months waiting on part. No ETA. There has been recall for similar vehicles with same issue, failure, damage. But not for this VIN. It’s the same failure with same damage. How is this not a recall for this VIN?

The contact owns a 2018 GMC Terrain. The contact stated while driving at various speeds, the vehicle would not decelerate as intended while depressing the brake pedal. No warning light was illuminated. The vehicle was previously repaired at a local independent mechanic and the vacuum pump was replaced; however, approximately 32 days later the failure reoccurred. The local dealer was not contacted. The manufacturer was not made aware of the failure. The failure mileage was approximately 58,000.

The contact owns a 2018 GMC Terrain. The contact stated while driving 40-45 MPH, the vehicle started coasting and stopped unintendedly. The contact stated that the vehicle drove for a while and then coasted and stopped. The message that the “Engine Power Reduced” was displayed. The contact stated that the brake system warning light was also illuminated. The vehicle was towed to an independent mechanic who determined that the camshaft had disintegrated into the engine. The mechanic informed the contact the vehicle was unrepairable. The vehicle was not repaired. The local dealer was not contacted. The manufacturer was not made aware of the issue. The failure mileage was approximately 60,000.