2017 GMC Terrain owner complaints

The contact owns a 2017 GMC Terrain. The contact stated that while her daughter was driving at an undisclosed speed, she observed white smoke coming from the vehicle, and the vehicle lost motive power. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who determined that the vehicle was consuming an excessive amount of engine oil. The vehicle was not repaired. The vehicle was taken to another independent mechanic, who confirmed the diagnosis. The vehicle was not repaired. The manufacturer was notified of the failure but did not assist. The failure mileage was 125,000.

The contact owns a 2017 GMC Terrain. The contact stated after stopping and shifting into park(P), the ignition switch could not be turned off and the key could not be removed from the ignition switch. While the contact was inspecting the rear of the vehicle, the vehicle started to roll backwards, almost injuring the contact. The vehicle was later driven to the local dealer who diagnosed that the control shifter was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 41,000.

At around 20 miles per hour, while accelerating, all torque is lost and the vehicle engine revs high. It takes a few seconds, then the transmission finally shifts into the next gear. This causes a big jolt. It is dangerous, all power is lost, then suddenly too much power is applied. This has happened since I purchased the vehicle. I have taken it to the dealership. They won't do anything about it. The vehicle now has 40,502 miles.

My vehicle only has 78,000 miles on it and the timing chain needs to be replaced?! This is no longer under warranty because it’s been over 5 years but this should last a life time. Now I have a car that doesn’t start or run that I have to make payments on and no one wants to do the work on my car! I looked online and a bunch of people are having the same issue with the same exact car at similar mileage and the same issue! GMC needs to do a recall on this issue, many people are losing money and it’s a financial crisis.

I had my 2017 GMC terrain denali for two years and have already experienced two serious issues. Issue #1-I noticed a burning smell, grinding noise, and hesitation when driving. I brought it to the dealership where I bought it and was told that there was a factory defect which caused something inside my transfer to bore a hole through it. Dealer could not get the part for 2 weeks. It was covered under my warranty. A month later while getting an oil change at a different auto shop, I was asked if I recently had work done only transmission because the entire thing was loose and moving, and the car did not drive right. I was told it was not safe to drive. I brought it back to the dealership and was told that they couldn't find anything. They tightened the bolts on the transfer case and charg

Engine shut off while doing 70 mph on interstate. There was no warning signs or nothing.

We have had 4 transmissions since we bought the vehicle. It slows down to almost a stop after it hits 30 mph and makes weird noises all throughout the vehicle. The back right tire sticks to the pavement and jerks when i start to drive. The key ignition has been fixed several times and still sometimes won't turn with the key or come out. Yes Warranty told the repaid service company to fix whatever, and they did but it still after 2 more transmission hasn't fixed the issues. Engine light and not sure what else.

This car burns 1 quart of 5w-30 synthetic blend oil every 200 miles! The pcv valve has been cleaned numerous times and this does not affect the burning oil issue and yes this can be inspected upon request. Safety put at risk you ask, this is a ticking timebomb ready to ruin the engine due to burning oil, leaves me stranded in my rural town for fear of mechanical breakdown, need to carry two 5 quart containers of oil, and dipstick needs to be checked every 100 miles. I have scheduled appt with GMC dealer in Chadron NE for mid January 2026. There are no warning lamps or messages that appear and this problem has been going on since August 2025, bought the car February 2025 from Chevy dealer in above mentioned town. KBB has a trade in value for this car at 1500 and private sale at 1900 f

In very cold weather the 2.4 engines will blow the rear main seal out and cause rapid oil loss causing engine failure. This is the second time it has happened. First time was February 2022 and the dealer said they havent seen this problem before

It was Christmas weekend, the coldest days our area had seen this time of year in decades. Temperatures were around 0 degrees, with wind chills that were -25 below. The check engine light had come on the day before. My husband was literally driving to the mechanic to have it looked at, when the vehicle completely broke down across the street from his destination. Thank God he was approaching an intersection when it died, and not traveling at a higher rate of speed, where he could have been injured, or others on the roadway around him could have been injured. We had the vehicle towed to our GMC dealership where we purchased it just three years prior. Upon inspection from the mechanic, it was determined that the PCV valve was plugged causing pressure on the rear main seal, which then blew ou

For a year we have had to check to the oil weekly and add oil due to the vehicle burning oil so quickly. The past month we have had to check it daily and add oil. We do regular routine oil changes and have had to get them before the next one is due. Recently when driving the “oil pressure low stop engine” light has been coming on almost daily. The oil change company has reported to us that it is due to the 2.4 Eco tech motor. You can smell the oil burning through the vents inside the car.

Driver's side taillight & reverse light fills with water. This unsealed light issue has caused electrical wire corrosion.

The contact owns a 2017 GMC Terrain. The contact received notification NHTSA Campaign Number: 22V137000 (Exterior Lighting) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The local dealer was notified of the issue and confirmed that parts were not yet available. The manufacturer was notified of the issue and informed the contact that a second notice would be coming soon. The contact had not experienced a failure. Parts distribution disconnect.

The latch for the rear hatch/door does not release every time. There have been instances when itmes have been in the cargo area and when the button is pressed, it will not release the latch. This causes someone to have to crawl over the back seat to retrieve the items from the cargo area. This also is causing my son to have to store items, that would normally be in the crgo area, on his back seat. I owned a 2015 terrain and had this same issue. The latch was replaced but still did not operate correctly.

timing chain issues resulting in a loss of power of the vehicle while driving. The vehicle stalls out and shuts off. Or it will go into power saving mode and slow down to only 20mph. It did this to me one a MAJOR HIGHWAY and I almost was in an accident. Way to many issues with gmc owners and the timing chain on their vehicles

Driver side head curtain airbags failed to properly deploy during rollover accident Not my vehicle, this is vehicle accident I responded to, Captain Fire Dept

I've had my terrain for 3 months. Car had 3400 miles at the time of the issue. Backed out of my driveway, put the car in drive and it wouldn't go. The car would rev up but wouldn't move forward. Had to put the car in neutral and push out of the middle of the street. Car was stranded in the street for three days due to the dealership service department being closed. Each day I tried to put the car in drive and it still wouldn't go when put in drive or manual only reverse. Car was towed to the dealership and sat for another day before the dealership could get to it. Dealership called and the car would drive with no issue. Asked if something could have shifted when the car was towed so they kept the car one more day to run some diagnostic tests which still resulted in nothing being found.

The power steering assembly failed and caught on fire. This then caused the engine to malfunction and no longer work. This happened while driving on the interstate at a speed of approximately 80mph. No prior check engine lights were visible

The contact owns a 2017 GMC Terrain. The contact stated that on two separate occasions, the ignition key became stuck inside the ignition switch. The vehicle was towed to the local dealer who was unable to duplicate the failure. The cause of the failure was not determined. The manufacturer was notified of the failure but no assistance was offered. The failure mileage was 110,000.