definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
22,881 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2014 GMC Terrain engine problems

engine problem

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2014 GMC Terrain Owner Comments

problem #8

Oct 102016


  • 53,000 miles


For the past two months there has been a steady increase in carbon monoxide leak in the cabin of my vehicle. Initially I thought it was something that will go away but for some months now the leak has been growing. I have to drive with my windows down just to be able to breathe in my vehicle. This vehicle have not had an accident or damage. I have kept a clean maintenance record of this vehicle. I am a disabled veteran with tbi and ptsd and the fumes from the carbon monoxide in my vehicle is causing my migraines to intensify. Please help me resolve this issue as soon as possible before I die behind the wheel one day driving in my vehicle. As soon as I turn the vehicle on, the carbon monoxide fills the cabin up.

- Lewis Center, OH, USA

problem #7

Oct 082016


  • 149 miles
3 years old now and still getting around 10mpg and from the first day I got it in 2014 the drive shaft is rusted and was told by the dealer that nothing is wrong with the car. I also notice that when driving at night that the head lights are not made to see street name signs I have to use the high beams to see if I have the right street when looking for the place I have to go.

- Hudson, FL, USA

problem #6

Jan 222016


  • 20,000 miles
Wife was driving her vehicle, all service engine lights displayed, car de-accelerated and was able to limp into a business on a 45 mph road. Took car to dealership, all service engine lights were on display, service technician acknowledged this. Cannot duplicate problem, no problem found in diagnostic testing.

- Smyrna, GA, USA

problem #5

Nov 142015


  • 49,500 miles


I was driving my Terrain yesterday, and went to adjust my heater vent and when I bumped my ignition key, it went into the accessory position, shutting off the engine and power steering

- Rittman, OH, USA

problem #4

May 052015


  • miles
Drove my 2014 6 cylinder GMC Terrain with engine oil level filled for 4 cylinder before discovery of the dangerous oil level. GMC in detroit was notified in certified letter and local dealer was notified. Neither responded in writing as I requested.

- Indianapolis, IN, USA

problem #3

Jun 042015

Terrain 6-cyl

  • 33,000 miles
Driver had stopped at stop sign on the exit ramp and as she began to accelerate to crossover to appropriate lane the car stalled in the middle of the road, reduced engine light came on, and check stability light lit. This was in a very dangerous location as the side road the driver was located was at the bottom of a hill, so oncoming traffic would not have been able to stop and it would have been a T-bone hit for the driver and head on for the oncoming vehicle. The car slowly (very, very slowly) moved forward enough to finally get across street and to a safe place. Although no accidents or injuries occurred, it was by the grace of god that no traffic was coming over the hill. This had the potential and has the potential of being a deadly problem if it occurs again or if another vehicle has the same issue. Immediately had tow truck pick up car and take to GMC dealership. I am awaiting the results from the dealership. My work requires a lot of travel and now I do not feel safe in this car with this issue (which after research today seems to happen a lot in GMC vehicles. )

- Centre, AL, USA

problem #2

Feb 072015


  • 12,000 miles
The contact owns a 2014 GMC Terrain. The contact stated that while driving at approximately 45 mph and approaching a stop light, the vehicle revved up to 10,000 RPM's as the engine stalled without warning. The instrument panel and exterior lights failed. The failure recurred two times. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was 12,000. Updated 5/19/15

- Cedar Rapids, IA, USA

problem #1

Oct 172014

Terrain 4-cyl

  • 15,400 miles
I was driving home after work around 7pm going about 45-50 mph and all of a sudden my car began slowing down and I could not accelerate. This is when I realized that my car had shut off while driving. Also, my headlights turned off which I noticed immediately since it was dark outside, the computer system shut down, gas indicator went to E and the engine turned off. I was able to coast over to the right lane and as the car was slowing down my steering wheel began to lock up. Once I was fully pulled over from the traffic, I braked and put the car into park. I waited a few minutes to catch my breath on what had just happened because this could have caused a bad accident if it were more traffic. Since I was pulled over I thought I would try to restart my car. Before I restarted it, I noticed that my key ignition was still in the on position so I turned it back to take the key out and then immediately placed it back in and turned it to successfully restart the car. This is the first time that this has happened in this car. I've had it since Dec. 2013 and have a little over 15K miles. I will be contacting the GMC dealership regarding this issue since I did not see any recalls addressing this issue.

- Crofton, MD, USA

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