2023 GMC Terrain: check engine light

Filed Aug 5, 2026 · Engine, Fuel system · 27,000 miles · MA

The contact owns a 2023 GMC Terrain. The contact stated that while driving at various speeds, the vehicle unexpectedly decelerated and failed to properly accelerate. The service transmission and service fuel management system messages were displayed, and the check engine warning light was flashing with several other unknown warnings illuminated. The vehicle was taken to the local dealer and while test-driving the vehicle, the vehicle stalled. The vehicle was towed back to the dealer. The cause of the failure was not yet determined. The manufacturer was notified of the failure, and an engineer was sent to the dealer to inspect the vehicle. No further information was available. The contact stated that the transmission module was previously replaced, but the failure persisted. The failure mileage was 27,000.

Filed May 29, 2026 · Engine, Fuel system · 45,000 miles · IL

The contact owns a 2023 GMC Terrain. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated and the engine stalled. The contact attempted to drive the vehicle to the shoulder of the road, the engine seized. The contact stated while attempting to start the vehicle, the vehicle failed to start. The contact The vehicle was towed to an independent mechanic where it was diagnosed with a failed fuel pump. The contact was informed that the fuel pump needed to be replaced. The failure reoccurred. The vehicle was towed back to the independent mechanic where it was diagnosed with a failed fuel injector. The contact was informed that the fuel injector needed to be replaced. The vehicle was repaired. The failure reoccurred. The vehicle was taken back to the dealer where it was diagnosed with a failed Number 3 fuel injector. The contact was informed that the fuel injector needed to be replaced. The parts were ordered, and the vehicle was being repaired. The dealer was made aware of the failure. The manufacturer was not made aware of the failure. The failure mileage was approximately 45,000.

Filed May 26, 2026 · Acceleration, Fuel system · TX

I was driving the vehicle on the highway the cruise control was on. All of a sudden I got a warning on vehicle info panel that stated vehicle power is reduced. The vehicle decelerated on its own and I could not accelerate past 55. The check engine light came on. I pulled off the road and turned the vehicle off. After about 10 minutes, I started the car back up and proceeded down the highway at normal speed. The check engine light remained on. I stopped at a Chevrolet dealer service center in Ft Stockton, TX, to have the vehicle looked at. They could find no error codes and could not duplicate the problem. I was sent on my way. This has happened multiple times while driving on roads in my area. Mostly while on the highway.

Filed May 18, 2026 · Fuel system · TX

Vehicle stalled while driving and would not restart. Strong gasoline smell present and on ground. Third occurrence. Vehicle stalled while driving at on busy road (safety issue both times). Strong raw gas smell. Would not crank afterward. Dash powered normally with check engine light. Happened previously around 27k miles in September 2025. Occurred again May 9, 2026. Occurred again today l, May 18, 2026. Vehicles is being towed to dealership again for the 3rd time

Filed May 8, 2026 · Fuel system · TX

Car reduced speed and the smell of gas filled the car. Car shut off. Check engine light came on with reduced speed. This is the second time this has happened. Gas leaked onto ground from car. Car stalls immediately while driving and does not allow you to press the gas to keep moving. Almost hit from behind on Main Street.

Filed Apr 16, 2026 · Engine, Fuel system · TX

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.

Filed Mar 4, 2026 · Engine, Fuel system · OH

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.

Filed Nov 7, 2025 · Electrical, Engine · WI

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

Filed Aug 19, 2025 · Fuel system, Transmission · 12,825 miles · TX

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.

Filed Jun 26, 2025 · Engine, Fuel system · 41,000 miles · CO

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 federal safety agency Hotline for assistance. The failure mileage was 41,000.

Filed Mar 23, 2025 · Fuel system · FL

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.

Filed Jan 24, 2025 · Fuel system · 35,600 miles · TN

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.