GMC Terrain Complaints

3,167 consumer complaints on file.

#11695311October 23, 2025
ENGINE, FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER
The car was at a red light so it automatically stopped. when the lights turned green, I removed my foot from the break and the car would not move. I had to call OnStar for roadside assistance and they called the police to make sure I was safe and that traffic flowed safely. My car was towed to the dealership after they tried to start the car by the key and my jumper cables. The car would not start. The dealership is unable to start the car as well and they are saying that the issue with the fuel pump is not under the most recent recall for my VIN number. I was able to locate the recall for the same exact issue that I’m having under my VIN number on the GMC website. I have filed a report with the GMC manufacturer to try and get this issue fixed. I have brought this car in multiple times to the dealership I purchased from and an additional dealership to show them the issues that I have been having with this car starting and stopping, I could have been ran over by a public transportation bus today.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694674October 21, 2025
ENGINE
The contact owns a 2013 GMC Terrain. The contact stated that while coming to a complete stop or shifting into reverse, the vehicle lost automotive power. The check engine warning light was illuminated. In addition, the contact stated that the vehicle was shifted into park(P) to regain motive power. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 200,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694687October 21, 2025
SERVICE BRAKES
When approaching a stop sign, the brake pedal became extremely hard I was unable to stop, and rolled through the intersection avoiding collision. I was able to slow down enough to engage the emergency brake. There are no lights on the dash.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694577October 20, 2025
ENGINE
I was driving home from vacation the vehicle went into limp mode and started to run very poorly with a brake pedal that was almost impossible to push. I limped the vehicle a couple of miles to the next exit. I had the car trailered home and taken to a service center the following Monday. They inspected the vehicle and found the vacuum pump had failed and caused what was described as “catastrophic engine failure.” They are now saying it needs a full motor replacement due to the widespread and severe damage. This is not the first time this pump has been an issue or supposed issue. About a year before this incident a month after we bought the vehicle in used condition from a GM dealership it started making a noise. We took it back to see if they could help us out being that it was recently purchased and they diagnosed it as the vacuum pump making the noise. They wanted almost $800.00 to replace it. I googled a video on how to fix it and found the cost of the part. The part itself is between $75-$90 from local and name brand parts stores. I paid the $250 diagnostic fee and took it somewhere else for a second opinion. The GM dealership pushed hard for the vacuum pump replacement and told me it was a well known issue for that part on that motor in many different makes and models. They said they recommend you change that mechanical part out every 80k miles or so and that you do not go by what the owners manual says for oil changes which is 5k miles and instead do that every 3k miles. That should not be “preventative maintenance.” That is a manufacturer issue. This should be a recall on the pump. I again did research and this vacuum pump is a known issue. You can find endless examples and discussions about it. It turned out not to be the pump originally that was making the noise saving me $800. The service center that has it now has all the pictures and pieces to show it’s failure and damage. It’s unsafe for something $85 dollars to cause that while driving at any time.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694159October 17, 2025
AIR BAGS, SERVICE BRAKES, HYDRAULIC
The contact owns a 2018 GMC Terrain. The contact stated while driving at an undisclosed speed, the air bag and ABS warning lights illuminated. The vehicle was taken to Auto Zone to be diagnosed. The vehicle was diagnosed with air bag failure. The contact was informed that the air bag needed to be replaced. The vehicle was not repaired. The dealer was made aware of the failure; however, the contact was informed that there were no open recalls on the VIN. In addition, the contact was informed that once a recall repair was completed, it would not be performed a second time free of charge. The manufacturer was not made aware of the failure. The failure mileage was approximately 95,100.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11694106October 17, 2025
POWER TRAIN, FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP:CONTROL/DRIVE MODULE
The contact owns a 2022 GMC Terrain. The contact stated while driving approximately 5-10 MPH, the vehicle stopped independently, and the gear shifter failed to shift to neutral(N). A dealer was contacted. The vehicle was taken to the dealer where it diagnosed and determined that the fuel pump power control module needed to be replaced. The fuel pump power control module was replaced, and the vehicle was repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 12,777.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693948October 16, 2025
ENGINE
The contact owns a 2019 GMC Terrain. The contact stated that while driving at an undisclosed speed, the vehicle hesitated, with the check engine warning light illuminated. The contact stated that the warning light turned off after approximately three miles of driving. The contact also stated that the vehicle experienced abnormal RPM fluctuations while driving. The vehicle was taken to an independent mechanic, where it was diagnosed; however, the diagnostic information was not provided to the contact. The vehicle was not repaired. The vehicle was then taken to the dealer but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 117,951.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693911October 16, 2025
ELECTRICAL SYSTEM
Screen went black on 3 different occasions, since purchasing vehicle
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693908October 16, 2025
WHEELS, POWER TRAIN, SUSPENSION
Front drivers side wheel makes a clicking/popping noise when turning to the right.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693545October 15, 2025
UNKNOWN OR OTHER
Liftgate automatically closing and failure to remain open causing a safety hazard for anyone standing at the liftgate.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692986October 12, 2025
SERVICE BRAKES, ENGINE
Driving approximately 70mph on interstate. Came to a slight hill, gently applied brake pressure, brakes become hard to apply/would not apply. After diagnostics, found Brake Vacuum Pump with damaged fins.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692086October 8, 2025
POWER TRAIN
The contact owns a 2018 GMC Terrain. The contact stated that while driving at an undisclosed speed, the unintendedly decelerated and failed to properly accelerate. The vehicle was taken to the local dealer, who diagnosed the vehicle with transmission failure. The contact was informed that the transmission needed to be replaced. The transmission was replaced with a used transmission, but the failure reoccurred. The vehicle was taken back to the local dealer who diagnosed and determined that the replacement transmission had failed and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not notified of the failure. The failure mileage was 53,000. The VIN was not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11692180October 8, 2025
POWER TRAIN
The contact owns a 2020 GMC Terrain. The contact stated that while making a turn, the transmission shifted into neutral and briefly lost motive power and stalled. No warning lights were illuminated. The contact was able to restart the vehicle; however, the vehicle failed to function while shifting to drive(D) or reverse(R). The contact opened and closed the door to see if the vehicle would reboot. After several attempts, the vehicle returned to normal functionality. The contact stated that on a separate occasion, the transmission was leaking transmission fluid. The transmission was constantly slipping. The check engine warning light was intermittently illuminated. The vehicle was taken to the dealer, where it was diagnosed that the START/STOP accumulator in the cap was missing bolts, which caused the transmission to fail. An unknown code was provided to the contact. The vehicle was not repaired due to the cost. The vehicle was taken to various independent mechanics who confirmed that the transmission had failed. The manufacturer was made aware of the failure. The failure mileage was approximately 94,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691600October 6, 2025
UNKNOWN OR OTHER, SERVICE BRAKES
We have been having varying issues with this GMC, and have found numerous others with the same issue. Vacuum pump went out while driving. Thankfully I was not going very fast and it stopped prior to hitting someone. This is a known issue, yet no recall from GMC. Vacuum pump is said to have been failing causing other engine and transmission issues that can never be "re-created" for the vehicle to be fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691643October 6, 2025
ENGINE
The contact's uncle owns a 2012 GMC Terrain. The contact stated that while driving 34-35 MPH, the vehicle stalled. There was no warning light illuminated. The contact was able to pull over to the side of the road and allowed the vehicle to cool down. The contact drove to the residence under 15 MPH. The vehicle was taken to the dealer, where it was diagnosed that the variable valve timing chain was bent, and the dealer determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 100,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691421October 5, 2025
ELECTRICAL SYSTEM
Backup camera not working and has a blue screen. The camera was replaced. The fuses & wires were inspected and the screen remains blue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691344October 4, 2025
SERVICE BRAKES
I was backing out of the driveway, and it was extremely hard to brake enough to stop the car. I immediately parked back into the driveway. I had to stand on the brake to completely stop. Vacuum pump was completely busted and in many pieces.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11691195October 3, 2025
ENGINE, POWER TRAIN, SERVICE BRAKES
April 2025, Vacuum Pump went out meaning lost breaks going 60 miles per hour down the road after engine light came on. Left me and two children stranded 2 hours from home with no way to get back except a tow. Now September 2025 Cam Shafts are out as well as Vacuum Pump. Stranded boyfriend and I two hours away again. Now metal in oil and warranty is not willing to cover it due to the vacuum pump going out. Made a post on Facebook and got lots of feedback on how their newer terrains have done the same things. Work in insurance and have people car pertaining to their terrains wondering if we cover engine replacements. There is major issues with these vehicle. Mine only has 107,000 miles on it and I have 12,000 left to pay. The motor is shot and dealership wants to “flush” the metal out of the engine. Very frustrated, I put 12,000 out of my college fund to have a reliable vehicle for my two kids and now this is all I have. A car that doesn’t run. I called warranty and the man I talked to even said that they get a lot of calls for these cars needing to be fixed. I am at a loss on what to do now. The below information about the incident is for the most recent one happening in September. I know that this sounds like a warranty and dealership issue but I guaranty if you send something out to terrain owners they will report major issues that they have had. Leaving them stuck in loans and no where to go.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11689847September 26, 2025
SERVICE BRAKES
On my 2020 GMC terrain the vacuum pump failed and caused my braking system to go out completely. I had to almost stand up on the brakes to get the car to stop and thankfully I got it come to a stop before smashing into another car. I contacted gmc and while they know this is a ongoing problem and there is a warranty out for this particular problem (150,000 miles or 10 year warranty) I was told it is part/ factory specific and that if it was manufactured in certain facilities or had certain parts that they would cover the cost to fix it but however my vehicle was not covered. This poses a dangerous problem for GMC owners. As soon as the check engine light came on I had absolutely no control over the brakes and it was a miracle it stopped. There was no warning prior to this incident and upon looking up information this seems to be a recurrent problem that GMC needs to address seeing as they say they value their customers.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11689378September 24, 2025
SUSPENSION
Recently experience rear differential binding with vehicle resulting in an accident.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Terrain