2014 GMC Terrain: check engine light

Filed Oct 5, 2026 · Engine · 65,000 miles · FL

The contact owns a 2014 GMC Terrain. The contact stated that the exhaust manifold was previously replaced due to an exhaust leak and the vehicle was towed. The contact stated that the vehicle was experiencing excessive oil consumption, and a quart of oil was added every 500 to 1,000 miles, causing an abnormal engine ticking sound and timing chain sound. The check engine warning light was illuminated. The contact retrieved DTC: P0420. The vehicle was taken to an independent mechanic, where the timing chain and catalytic converter were replaced; however, the failure persisted. The contact stated that the engine ran rough and experienced reduced power, and the vehicle was idling rough and the vehicle hesitated while accelerating. The contact became aware of an abnormal oil odor during the failure. Additional trouble codes P0017 and P0420 were retrieved. The failure mileage was approximately 65,000.

Filed Feb 18, 2026 · Engine · MI

My husband just did an at home oil change on the car not long before the incident. Unfortunately my car was barely under 3,000 miles since the oil change and we were going to change the oil again when my engine died mid drive on the way home. There was no oil in the car due to high oil consumption and no coolant either. High oil consumption was not reported and not disclosed to me before and a broken guide for my timing chain leading to total engine failure just after I started to exit the highway. Had my car died any sooner I would have crashed. Or wrecked with another vehicle. GMC and the dealership I got the car from did not properly disclose this safety risk to me when I purchased the car and no recall information was ever sent out. The high oil consumption causing engine failure has been a part of a class action lawsuit for these vehicles before and THAT was not disclosed to me either at any point. No notifications of low oil or other issues aside from a check engine light came on for my vehicle when I was driving. I dont know how fast I was going as I was applying the brakes to my car for a traffic light.

Filed Jul 8, 2025 · Engine · 125,000 miles · MN

The contact owns a 2014 GMC Terrain. The contact stated while driving at an undisclosed speed, the contact became aware of an abnormal odor coming from the engine compartment, with the check engine warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed that the engine failed due to excessive oil consumption. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The manufacturer was made aware of the failure. The approximate failure mileage was 125,000.

Filed Jan 10, 2025 · Engine · 160,000 miles · PA

The contact owns a 2014 GMC Terrain. The contact stated that the oil reservoir was constantly needing to be refilled. The contact stated that he had to have the oil changed and added every 4 weeks. The contact stated that the check engine warning light had been illuminated. The contact had taken the vehicle to an independent mechanic who diagnosed that the catalytic converter had failed due to engine oil deposits and needed to be replaced. The vehicle was repaired. The contact stated that the failure reoccurred, he saw the check engine warning light was illuminated and was again having to add oil due to excessive oil consumption. The vehicle was taken back to the same independent mechanic who advised that the catalytic converter was going to fail again due to oil deposits. The vehicle was not repaired. The manufacturer was informed of the failure and referred to the federal safety agency Hotline. The failure mileage was approximately 160,000.

Filed Oct 23, 2024 · Engine, Steering · 159,500 miles · TX

The contact owns a 2014 GMC Terrain. The contact stated while at a complete stop at a red light, the doors were making locking and unlocking sounds. The contact stated upon depressing the accelerator pedal to resume driving, the vehicle failed to exceed 25 MPH. The messages "Service Stabili-trak" and "Service Power Steering" were displayed, and the check engine warning light was illuminated. The contact was able to drive to the residence. The vehicle was towed to the dealer, where it was being diagnosed. The vehicle was not yet diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 159,500.

Filed Aug 7, 2024 · Engine · MO

On May 10, 2024 while driving my 2014 GMC Terrain driving at about 65mph my car cut off while driving to the point that the car started slowing down which had med confused as to what was going on but thankfully I was able to safely move over to the side of the of the highway in order to be in safer position to start the car back up. There was no warrant signs that the car had cut off but I had the air conditioning on do it stop blowing. At this point I knew the car was not safe to drive but I had to get off the highway. So I was about 5 miles from my exit which I was able to get to the exit without the car cutting off again on the highway but the car cut off once again on the exit as my speed was decelerating. I took my car to Meineke Car Care a few days later and was told that my car needed to have the solenoid replaced and the timing chain kit which was what the diagnostic was showing. Once they were able to fully inspect the car I was told that the timing chain kit was broken and I had medal in my oil which was suggested that I replace my engine. This put me at risk of being in an accident that could have injured myself or someone. There were no warning indications. My check engine light was not on. I had to pay to have the engine replaced which before I had it replaced I took my car to another shop just to get a second opinion in which I had the engine replaced.

Filed Jul 26, 2024 · Engine · 147,623 miles · SC

The contact owns a 2014 GMC Terrain. The contact stated that after refueling the vehicle, the check engine warning light illuminated. The contact stated while driving at an undisclosed speed, the vehicle started shaking and vibrating and then stalled. The vehicle was examined by a local mechanic, who determined that the engine was damaged due to a lack of engine oil. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer and local dealer were not notified of the failure. The failure mileage was 147,623.

Filed Jul 19, 2024 · Engine · 150,000 miles · MA

The contact owns a 2014 GMC Terrain. The contact stated while driving at approximately 65 MPH, the accelerator pedal was depressed to overtake another vehicle in the right lane and the RPM raised up 8,000 RPM. The contact stated that there was an abnormal banging sound coming from the engine compartment. The contact stated that smoke started coming from the front of the vehicle. The contact stated that the check engine and check oil warning lights were illuminated. The vehicle lost motive power and the contact pulled off the roadway and turned off the vehicle. The contact had the vehicle towed to an independent mechanic. The mechanic diagnosed the vehicle and determined that a rod bearing had fractured and pierced the cylinder into the engine block. The contact was advised by the mechanic that the engine needed to be replaced. The vehicle was not repaired. The contact stated that prior to the engine failure, the contact was continuously adding oil to the engine. The contact was adding one quart of oil every week for more than 10 months. The manufacturer was informed of the failure. The failure mileage was approximately 150,000.

Filed Jul 11, 2024 · Fuel system · PA

The AC is very poor and no back AC units is bad for small children. Also, engine light for exhaust

Filed Oct 24, 2023 · Acceleration, Transmission · TX

On October 13, 2023, I was driving on the highway when my 2014 GMC Terrain power was reduced. Suddenly, the engine light came on and car began throttling. Second, an error message appeared on my dashboard indicating “ engine power is reduced.” Then it stopped in the middle of the highway. I was able to restart my vehicle and drove it to a nearby mechanic shop. The mechanic said the problem was my timing chain and that my vehicle was not drivable. I left my vehicle at the mechanic shop because it was the weekend and It needed it to be towed to the dealership. On Monday, October 16, 2023, I had my vehicle towed to Buick Classic Service Center. After waiting for two days, I received a call from the service center stating that my 2014 GMC Terrain timing chain and pressure gas pump was the cause of the problem - with my vehicle. After, reading other owners similar complaints ; why is there not a recall to address this problem? Now, I am stuck without a vehicle and the company has no idea how long it will take to get the parts needed to fix my vehicle. I was told that the timing chain and a tension is on back order due to the employees of GMC being are on strike.

Filed May 4, 2023 · Engine, Fuel system · WI

Car engine light coming on because of codes P0010, constant oil changes, acceleration slows. Turns off a low idle. No low oil warning lights at all.

Filed Mar 13, 2023 · Engine · PA

Bought car in 2021 and a few months later car started turning off while driving. Check engine light came on..replaced sensors and all was good. Fast forward to a week ago...scheduled an oil change like I always do...check engine light came on and engine started rattling. Stopped driving immediately. Checked oil and there was none. Added 3 quarts. Took to garage to have them take a look at it. He did the oil change but doesn't handle engine repairs and believes it is my timing belt. The vehicle only has about 65,000 miles on it and is a 2014. Common occurance apparently with this vehicle that needs to be addressed.