2023 GMC Terrain Complaint Log

Took dealer 3/26 for Sam issue Engine Power reduced after already cause me hit curb. Got it out 4/1/26 Now 4/5/26 it happened again same codes after they claimed they fixed it. Also keep having Emergency services come on a caused my dashboard out. My issues is car keeps stalling losing power. Same codes as week ago after dealer fix. Also 4 time took for noises in my car from passenger side. They keep telling me they can’t replicate it, but you can clearly see where the door is not lined up. This has been going on for over 30,000 miles for that. Like some of these issues have been going on since the 36,000 but now I’m having issues where I’m losing power like this is insane all before 60,000 miles which I’m about to hit. It’s gonna end up getting me killed on the interstate.

Took dealer 3/26 for Sam issue Engine Power reduced after already cause me hit curb. Got it out 4/1/26 Now 4/5/26 it happened again same codes after they claimed they fixed it. Also keep having Emergency services come on a caused my dashboard out. My issues is car keeps stalling losing power. Same codes as week ago after dealer fix. Also 4 time took for noises in my car from passenger side. They keep telling me they can’t replicate it, but you can clearly see where the door is not lined up. This has been going on for over 30,000 miles for that. Like some of these issues have been going on since the 36,000 but now I’m having issues where I’m losing power like this is insane all before 60,000 miles which I’m about to hit. It’s gonna end up getting me killed on the interstate. My vin also says it’s fwd it’s awd AT4 . Called dealer said only to update software clearly not the issue. My doors are off and they have refused to fix those for over 30,000 miles now. It won’t let me attach any pics for some reason I’ve tried since yesterday

Out of nowhere and driving this morning, my engine reduced power came on. Then I started losing power in the car then it died on me once out of nowhere. I managed to make it home an hour and a half later, but that could’ve got me killed stopped by AutoZone since dealerships closed today and it tells me that it’s code P228C, P0089 fuel pump. And then last night my emergency service calling came on which one I looked it up so something to do with OnStar and could be a module so I’m not sure what that is. And then you add on the fact all the sudden in the last 24 hours, my screen keeps going in and out are not working last week. My volume wasn’t working. I love this car, but it seems to have a lot of issues all of a sudden and I’m fixing to be at 60,000 miles which is a big problem considering warranty will be expired. I’ve already had issues with squeaking and squealing from the windows that they claim they can’t find nothing and I’ve had to listen to it for almost 60,000 miles. I had to get this car because my other car blew up on me and I can’t afford another new car. I’ll be taking it to the dealership first thing in the morning and I hope to God that something can be fixed cause we’re in one car Family.

The contact owns a 2023 GMC Terrain. The contact was informed by his wife that while attempting to accelerate from being stationary, the vehicle was shaking abnormally and hesitated before accelerating. There were no warning lights illuminated. The vehicle was taken to the dealer to be diagnosed but the cause of failure was not yet determined. The vehicle was not repaired. The manufacturer was informed of the failure. The manufacturer opened a case for the failure. The failure mileage was approximately 13,000.

The contact owns a 2023 GMC Terrain. The contact stated that while driving on several occasions at various speeds, the check engine warning light illuminated, the message "Engine Power Reduced" was displayed, and the vehicle lost power. The vehicle stalled on three separate occasions. The vehicle was able to restart each time after approximately 15 minutes of waiting, but the vehicle failed to accelerate above 40 MPH. The vehicle was taken to a dealer and DTC: P228C, P0089, and P006C were retrieved, and the contact was informed that the fuel pump and fuel injectors needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

Complete engine failure @100,600 miles Engine power reduced and lost compression transmission module failure Will not exceed 20mph

The infotainment system is not working. It has the "black screen" issue.

The high pressure fuel pump, the car randomly goes into limp mode and stalls and then when cranking it back up in the middle of 635 it hesitates to start, done this 3 times already

GMC Terrain with 12,564 total miles had experienced an engine failure. Under normal driving conditions, the car was sluggish and would not accelerate properly when pulling out into traffic or when getting on the freeway/interstate causing fear for driver safety and causing traffic slowdowns or congestion with a significantly increased risk of crash. While driving to work, the vehicle service engine light turned on and displayed "reduced engine power". Upon investigation the dealership found codes P0011, P0014, P0016, P0017, and quoted "Cylinder 4 intake rocker had fallen off and laying on head, found excessive debris and metal material around rocker 4, Found cylinder 2 intake rocker to be worn sideways. Found heavy damage to intake camshaft. Removed oil filter - found excessive metal in oil filter". Secondary issue, infotainment screen would randomly flash bright white on the right half, causing a major driver distraction. Engine, turbo, and infotainment system were all replaced, and vehicle returned 11.06.2025

1st Failure. August 28, 2025. Vehicle stalled out while driving with NO warning. Check engine light stayed on. Could not drive. Car towed to dealership. Scanned codes found: p0089, p00c6 and p228c. Cause: Internal failure. Bulletin pertaining to this issue performed. Program of ecm per bulletin. 2nd Failure. February 19, 2026 Vehicle stalled out a 2nd time while driving with NO warning. Check engine light stayed on. Could not drive. Towed in a 2nd time. Scanned codes found: p0089, p00c6, p228c and p2c1f. Cause: internal Fault. Fuel pump power control module replacement. Fuel pump replacement. 3rd Failure. March 4th, 2026. Vehicle stalled out a 3rd time while driving with NO warning. Check engine light stayed on. Could not drive. Towed in again to dealership. Currently sitting at dealership waiting on repairs a 3rd time for the same thing. Wife is 76 years old and is terrified to drive this car. What if this stalls out on the freeway in traffic. Car is unsafe to drive.

While driving the fuel pump failed and started spraying gas everywhere in the engine compartment.

My GMC Terrain was stopped in traffic at a Red Light. When I stepped on the gas pedal to proceed, the SUV shut-down. Could not move SUV in Traffic. Called Police and SUV was towed. SUV towed to GMC Dealer. The K111 Fuel Module was causing the problem. GMC Dealer Repair Shop removed and replaced the K111 Fuel Module. They claimed SUV is OK. I don't trust this SUV any longer. I read of similar problems with 2022 GMC Terrain and the Fuel Module defect causing the SUV to shut down. This is a safety hazard to the Driver and other vehicles on the highway.

My son was making a left onto a freeway on ramp after traffic cleared and the steering wheel completely locked up resulting in him going over the curb and rolling completely over in a steep ditch. This occurred at a low speed (no more than 25mph), confirmed by the Life369 app. My son's description was that it felt like the wheels were against a wall and the wheel wouldn't turn even though he was using both hands in an attempt to turn. My son said there was no warning lights or any other indication that he noticed, other than the complete locking up of the steering. The resulting rollover into the ditch has totaled the vehicle so it was not inspected by any collision shop. I attempted to check the steering in the tow yard but the vehicle had no power.

The contact owns a 2023 GMC Terrain. The contact stated while driving 15 MPH, the message "Engine Power Reduced” was displayed on the instrument panel. The contact stated that the vehicle the lost motive power in the middle of the roadway. The check engine warning light was illuminated. The vehicle was towed to the dealer, who diagnosed a failure with the high-pressure fuel pump, causing fuel to leak into the oil, resulting in damages to the catalytic converter and Oxygen sensor. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 41,000.

The contact owns a 2023 GMC Terrain. The contact stated that while driving at approximately 5 MPH, and entering the roadway from the driveway, the vehicle stalled. The contact stated that there were no warning lights. The contact stated that the vehicle had lost electrical power. The contact was unable to restart the vehicle. The vehicle used a push-button gear shift PRNDL, and the contact was unable to set the vehicle into park(P) to restart the engine. The contact was able to restart the vehicle after several attempts and drove the vehicle to a dealer. The contact stated that on the drive to the dealer, the check engine warning light illuminated, but they kept driving. The vehicle was diagnosed, and it was determined that the fuel module had failed and needed to be replaced. The vehicle was repaired. The manufacturer was informed of the failure. The failure mileage was 12,825.

While driving 40-45 mph the engine light came on and 50% loss of power was displayed on screen. Thankfully I wasn’t far from home and was in limp mode for the last 2 miles. The mileage of vehicle is 42,000 miles. The codes are reading low fuel pressure and faulty fuel pump. Any help would be appreciated as this shouldn’t be happening to this new of a vehicle.

At stop light turning right, the car stalled, cut on and cut back off, cut on and back off with about 30 cars behind me. Sputtering. On the dash board it said “Engine power reduced”. I had to be pushed out a main highway by police, and thankfully my [XXX] daughter wasn’t in the back seat. I have had this car 12 days with 48256 miles on it. I’m extremely concerned with the safety of this car. And when towed was leaking gas like fluid. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

GM Flier PIP6071A - continued engine misfire/chugging/buck/skip under load, going up hills, trying to pass, etc. Was taken to shop January 2025 ~90,000 with these symptoms. Charged for spark plug replacement (visit 1). Taken back January 2026 ~150,000 miles, charged for ignition coil 1 and spark plugs. Immediately returned as problem persisted, spark plugs replaced (visit 3). February 6 2026, same problem as before, spark plugs replaced (visit 4). February 18 2026, currently in shop, problem persisting, trying to say it is the other 3 ignition coils, even after I requested they check O2 sensor and inspect catalytic converter.

The contact owns a 2023 GMC Terrain. The contact stated while driving at an undisclosed speed, the vehicle was shaking and independently shifted into neutral. In addition, the check engine warning light illuminated, and the vehicle lost motive power. The vehicle was taken to the dealer where it was diagnosed with a possible fuel injector failure. The contact was informed that the fuel injector needed to be replaced. The vehicle was not repaired. The contact was informed that parts were on backorder. The contact stated that the failure occurred while on a trip. The contact was advised to contact the local dealer when she returned home. In addition, the contact stated that in December 2024, the high-pressure fuel tank was replaced by the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 35,600.

Rear main seal leak car has been with dealer since 12/30/24 until present day. No updates other than I may need a engine.

The contact owns a 2023 GMC Terrain. The contact stated that while driving 70-71 MPH, the vehicle suddenly decelerated. There was a red flashing light illuminated. The contact stated that the vehicle then accelerated. Additionally, while driving at an undisclosed speed, the vehicle decelerated, and the message that the sensor was dirty was displayed. The contact stated that the windshield was clean and clear but utilized the windshield wipers, and the warning light disappeared. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the local dealer for a diagnostic test. The failure mileage was approximately 6,912.

No warnings of any kind went off; I wasn’t even going 2 m.p.h. and hit a piece of wood that was right on the edge of the grass next to the road at the park. This is dangerous, especially at a park or other places where smaller children are present if I get that close to something and the none of the sensors go off letting me know there is something/someone that my vehicle could strike if not careful. I have not had it looked at yet, but plan to. No warnings of any kind have went off and it was functioning properly prior to this. There is severe damage to my vehicle

When I bought the vehicle new from dealership, they told me that side blind zone alert was not available at that time due to a semiconductor shortage, but that it would be available and could be retrofitted after they were available. I noticed that the 2022 retrofit had been authorized, and I need to know when I will be able to get this option retrofitted on my vehicle. It has horrible blind spots, and I have to literally turn around completely to see if there is anyone in the blind spots which is very dangerous because I’m taking my eyes off the vehicles in front of me to see the blind spots. This is dangerous in city driving where you are going 70mph in 4-6 lane traffic, almost bumper to bumper. If someone hits the brakes while I’m checking blind spots, then that could cause a wreck. I have all the other driver assistance, so the front braking will brake, but it is not a good idea for that to happen when someone is riding on your rear when the brakes slam on. I know I’m unique because I only see out of one eye at a time, but I believe this would still be a terrible issue for anyone trying to drive in traffic. I know the assistance packages don’t replace human interaction, but I do rely on those options to help me because of my eye condition. I told that to the dealer when I purchased this vehicle and they assured me that it was just a result of the shortages and it would be available for retrograde. I have called the dealer three or four times to check on this because at first they told me I was on the list and they would call me when the chip came in and they said it would be a few months. Well it’s been over a year and when I call now, they say it isn’t available and I asked them if I could just purchase the system myself instead of waiting for the recall, and they said I probably couldn’t afford it or it be worth it. I have looked on your site and others and I’ve seen nothing about it being in the works, so I want to report it so maybe you will look into it.

My vehicle continues to slip and jerk out of gear , brought in to a local Chevy dealership , they test drive the vehicle and Acknowledge the issue. They updated transmission software and give it back to me to drive for 1000 miles or 30 days and see if the problem continues. Problem gets worse slipping and jerking more and more , made appointment dealership cancels my appointment saying they have no transmission tech come back next month for an appointment . Same thing no transmission tech available go somewhere else

I bought a 2023 GMC Terrian SLE brand new 14 months ago. It has 30,000 miles on it. I was driving down [XXX] and the car turned off. No warning signs! Not to mention The car had no power! I couldn’t even put on my emergency flashers! Me and my 3 year old son luckily were able to make it through a lane of traffic and up the embankment to call for help! I had the car towed to the dealership and they can’t find anything wrong with it! The car is acting normal now but I don’t feel safe in it! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Please let me

The contact's husband owns a 2023 GMC Terrain. The contact stated while driving from a complete stop at the traffic light, the vehicle shut off inadvertently. The contact was able to pull to the side of the road. The contact pressed the Push to Start button several times, and the vehicle restarted. The message "Reduced Engine Performance" was displayed, and the check engine warning light was illuminated. The contact stated that she was able to drive; however, the vehicle failed to exceed 15 MPH upon depressing the accelerator pedal. The vehicle was taken to the dealer, who informed the contact that they could not duplicate the failure. Additionally, the contact stated while reversing in the driveway, the vehicle turned off. The contact stated upon restarting the vehicle, the message "Condition Not Correct for Shift" was displayed. The contact stated that the failure recurred while driving out of the driveway on another occasion. The vehicle was taken to the dealer on each occasion; however, the dealer informed the contact that they could not duplicate the failure. The vehicle remained at the dealer. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 24,000.

The problem with this car that continues is that when driving over 65 miles per hour/ more or less, the driver side door rattles and shakes. It rattle and it looks like if the door wants to detach. It only happens on the driver side, not the passenger side. I put my arm on the arm rest, and my arm shakes and that is not ok. I am concern and want to know what can be done about it. I do not feel comfortable driving when this happens and its a new car, it should not have this problem. The problem started right after I purchased the car and I already took it to service it and they said it was the tires not having enough air, but that's not the case, cause it still doing it. I need to take it to service it again Please advise what can be done about it and if they can find what the problem can be. Your assistance is very much appreciated. Thank you.