2024 GMC Terrain transmission & drivetrain problems

Related recalls

No recalls on file.

What owners say

1. Filed Oct 2, 2026NVOther / UnknownTransmission & Drivetrain

   GMC Adaptive learning transmission problems that lead to safety concerns, emissions reduction in MPG, and increased wear of the transmission. Regarding GM’s 9T45 automatic 9 speed transmission. Problem: - The GM Adaptive learning of the transmission does not have safe guards in place to prevent unsafe sift patterns and behavior. This results in shift flair behavior where the transmission will drop out of 3rd gear and pause before shifting to 4th gear. It will learn to lock…

   NHTSA complaint #11768619 · source
2. Filed Sep 1, 2026NVTransmission & Drivetrain

   Factory powertrain programming actively locks out 9th gear (overdrive) during freeway driving at speeds exceeding 60–65 mph. The vehicle refuses to upshift from 8th to 9th gear, forcing sustained high-RPM operation during standard highway cruising.

   NHTSA complaint #11761243 · source
3. Filed Jun 23, 2026GATransmission & Drivetrain

   The vehicle has experienced a recurring transmission-related defect that has required multiple repair attempts by an authorized GMC dealership. The transmission system has also exhibited fluid leakage. Despite prior repairs, the problem has continued to reoccur. Transmission and associated transmission fluid sealing components. The vehicle is currently available for inspection upon request. A transmission is a critical safety component that transfers engine power to the…

   NHTSA complaint #11745857 · source
4. Filed Jun 18, 2026NVEngineTransmission & Drivetrain

   Accelerator lag from any speed or stop. The care will take several seconds to hunt for the correct gear before shifting to accelerate. Or it will delay acceleration for several seconds while your pressing the accelerator. No SES indicator active. Mechanics can’t find issues. Other owners on forum a report the same sluggish behavior. These 1.5 turbo cars seem to need a software fix that they are not receiving. It’s like the drive by wire doesn’t register. Affects any gm…

   NHTSA complaint #11744960 · source
5. Filed Apr 20, 2026GATransmission & Drivetrain

   While driving the vehicle, the engine light came on, plus message board said service transmission and the engine went into limp mode. We let the car sit for awhile and checked the car. A scan said it was the pressure solenoid A in the transmission. The car sat for a day and the light was off. Drove the car and then it acted up again and now reverse doesn't work.

   NHTSA complaint #11732341 · source
6. Filed Mar 23, 20263,787 miWVTransmission & Drivetrain

   The contact owns a 2024 GMC Terrain. The contact became aware of a fluid leak underneath the vehicle. There was no warning light illuminated. The vehicle was driven to a local dealer, where it was diagnosed with a leaking torque converter seal, allowing transmission fluid to leak onto the ground. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 3,787.

   NHTSA complaint #11726445 · source
7. Filed Mar 11, 2026INEngineFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   I was driving the car on 12-22-25 i lost power my car died on i94. Battery died the dearlship couldnt get the code. Got the car back on 12-26-25. Engine light came on carrie gmc replaced battery . Car back on 12-29-25.. Engine light back on 12-31-25 car back on 1-8-26 replacled catalytic conveerted and oxy sensor. 2-20-26 driving on 1-94 lost engine power car back on 2-25 feul pump and feul line. Drove 300 miles engine light back on. Back to currie gmc on 2-26-26 untill…

   NHTSA complaint #11723520 · source
8. Filed Mar 4, 2026OKTransmission & Drivetrain

   I bought my car in July of 2025 and since then my car keeps derating and reducing engine power while driving down the road at 70 miles an hour. It cuts out and decreases power. I took my car to the shop twice to have them tell it needed an update. I drove away and then the car does it again. Since December my car has down this decreased power, derated notice more than 30 times!! It is a safety risk for me and my family because you never know when it will happen on the…

   NHTSA complaint #11722117 · source
9. Filed Feb 2, 2026PATransmission & Drivetrain

   Transmission dropped complete out of gear while driving. Got vehicle moving again. Took to dealership. Found complete internal transmission failure at 6779 miles. Transmission replaced with new unit. New transmission has erratic / hard shifts. Found replacement transmission leaking fluid due to front pump / porous case at 14800 miles. Customer Satisfaction Program N232433890 issued May 16, 2024

   NHTSA complaint #11714938 · source
10. Filed Jan 17, 2026CATransmission & Drivetrain

    Powertrain System failure while driving, causing complete loss of power on road. The car lacks any accessible manual overrides to put in neutral or turn off parking break. This leaves the car stuck in park with all four wheels locked in the middle of the road in an incident with no safe way to move or tow the vehicle. When attempting to tow car must be dragged, and parking brake continuously engages. Tow attempt took nearly 3 hours to saddle the vehicle in the roadway.…

    NHTSA complaint #11711615 · source
11. Filed Sep 17, 20256,766 miNYTowedEngineTransmission & Drivetrain

    The contact owns a 2024 GMC Terrain. The contact stated that while his wife was driving at various speeds, the vehicle experienced a loss of automotive power. The check engine and transmission warning lights were illuminated. In addition, the contact's wife attempted to restart the vehicle; however, the gear shifter failed to move from neutral(N) and remained in Low Power Mode. The vehicle was towed to a local dealer, where it was diagnosed, and DTC: P0700 and P073E were…

    NHTSA complaint #11687798 · source
12. Filed Aug 15, 2025MATransmission & Drivetrain

    I purchased a new 2024 GMC Terrain in March 2024. At the time of the incident the mileage was approximately 18,000 miles. On [XXX], as I was driving on a MA state highway, the car lost power with no warning. I was able to "coast" into a parking lot where I contacted OnStar; a flatbed tow truck was dispatched and the car was towed to the local dealership where it was purchased. At this time, the car is still at the dealer as I was informed by dealer service consultant that…

    NHTSA complaint #11680854 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology