Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2014 GMC Terrain owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2014 GMC Terrain. The contact stated that the vehicle failed to start, and the steering wheel was locked. A tow truck driver was able to start the vehicle after several attempts. There was no warning light illuminated. The contact was able to drive to the residence. The vehicle was taken to an independent mechanic, where the failure recurred. The mechanic was able to restart the vehicle and the contact drove to the residence. The vehicle was not diagnosed or repaired. The vehicle was taken back to the mechanic and was diagnosed. The vehicle was not repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was unknown.
Tensioner issues keeps breaking the timing chain. . Replaced twice at own cost. Fuel pump/ loss of power while driving. Back up camera doesn't work sometimes. Screen goes black. If key is left in the ignition it starts itself. If you try to use a car charger for a phone the AC shuts off and a "systems error" message pops up. This happens alot. It's an ongoing issue since I bought the car in Feburary this year.
My car had been needing at least 2quarts of oil in between oil changes which I have done every 3000 miles. The timing chain is bad which is caused by excessive oil consumption. The service power steering and stability track light comes on it its messing with the transmission until I disconnect the battery and reset it, and it also leaked inside my glove an f the passenger floorboards
Moved car to shovel drive way. Went to move it back and my car wouldn't start. Garage says it is the ECM Garage says GM has a hold on the sale/install on f this part as there is a known issue involving all unit including my vehicle and newer. The only recall currently is for exams for 2018 GMC Terrain ECM. My car will sit at the garage indefinitely.
ABS Brake problem and have tried to get it repaired for over 3 months and cannot seem to be able to get the part and call GM with no help. Can not tell me when or where to buy the part. Nobody seems to be able to get a new part and no help from GM. If there is this many problems that there is no part left available it should be a national recall.
The actuator that controls the blend door / recirculation door (moves the air from defrost to floor to vent) does not last more than a year in my vehicle. I see on the GMC Terrain forums that it is a common problem. It is a danger when defrost is needed on the windshield, and it doesn't work.
Tl* the contact owns a 2014 GMC Terrain. Upon attempting to turn off the vehicle, the key became stuck in the ignition. The contact was unable to remove the key. The contact spoke to the dealer (gilland Chevrolet GMC 3071 south us hwy 231, ozark, al 36360) where it was diagnosed that the ignition switch was likely at fault for the failure. The vehicle was not taken to a dealer or mechanic. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 56,000.
Tl* the contact owns a 2014 GMC Terrain. While in park, the vehicle failed to start. The vehicle was taken to a dealer where it was diagnosed that an animal chewed through the wiring harness, which was made of soy. The wiring harness needed to be replaced. The vehicle was repaired on numerous occasions; however, the failure recurred. The manufacturer was notified of the failure. The failure mileage was 18,000. Updated 10/26/16
The infotainment system (including back up camera, audio, navigation, temp display, etc.) freezes or the screen goes black. You can not use the audio controls at all. You can still adjust climate controls, but can not see the display. The back up camera has even been stuck on while no longer in reverse and driving forward. Has happened several different times, no indication to the cause.
Tl* the contact owns a 2014 GMC Terrain. The contact stated that while driving 40 MPH, the vehicle stalled. The contact was able to restart the vehicle and the anti collision warning light illuminated. The vehicle was not diagnosed or repaired. The failure recurred on numerous occasions. The manufacturer was notified of the failure. The failure mileage was 100.
Electrical complaints in other Terrain years
Frequently asked questions
How common are electrical problems on the 2014 GMC Terrain?
NHTSA has 31 complaints about the electrical system of the 2014 GMC Terrain, 10% of the model year's 297 complaints. The component named most often is ignition (1 mentions).
Is there a recall for 2014 GMC Terrain electrical problems?
No. NHTSA lists no electrical system recall for the 2014 GMC Terrain, though it has 2 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2014 GMC Terrain electrical problems start?
Half of the complaints with a recorded mileage happened before about 40,000 miles, and 32% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.