really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
4,841 miles

About These NHTSA Complaints:

The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.

Get notified about new defects, investigations, recalls & lawsuits for the 2018 GMC Terrain:

Unsubscribe any time. We don't sell/share your email.

Get free help with your lemon!
close ad
problem #6

May 012019


  • 14,000 miles
Bought brand new. At 14,000 miles all 4 rotors are pitted with grooves. Dealer took them apart and found nothing that could cause it. Said they were "weathered". took it to 2 other places and said it was a manufacture defect. Dealer wont replace because bumper to bumper wont cover it. Its a defect didnt notice until another dealer did the oil change. The dealer in February said they werent like that in February.

- Medina, NY, USA

problem #5

Mar 212019


  • 10,608 miles
I got a diagnostic alert: Service the enging and transmission system in your 2018 Terrain within 7 days. The code was P050F. I have a little over 10,000 miles on here.

- Johns Island, SC, USA

problem #4

Feb 262019


  • miles
I have around 6 to 7 month with the vehicle and since day one it made a weard noise in the engine transmission area and the vehicle doesnt respond and perform well I took it to the dealership and at first they stated it was something with the transmission and then they started giving me manydiferent excuses and that it was normal but still the SUV wouldnt respond I called GM and they opened a ticket but after that they said they could not do anything about it in other words they told me I had to deal with the issue. Yesturday Feb 26,2019 the SUV started having worst problems as to where it would not run mor then 33 miles a hour it started shaking rpms going wild the vehicle only has 5500 miles on it. I dont know what to do out of this time I have with it the vehicle has been more timed at the dealership than with

- Laredo, TX, USA

problem #3

Oct 182018


  • 650 miles
Takata recall my complaint does not stem from the dealership fixing the issue, as I have not brought the truck in yet for the fix. My issues lies in the fact that I have two young children ages 3 and 5 years old. I am now stuck in a lease for 3 years knowing the braking system is unstable. That causes alarming concern to me and my wife. I do not want to drive this car with my children in it and now I have no choice but to so for the remainder of the lease which is almost 3 years as I just leased the vehicle in July. There is no guarantee that this can¿T happen again and I therefore ask to be able to lease another vehicle at the price I am currently paying per month. The safety of my family is first and foremost. Unless I receive a guarantee from the manufacturer that this will not happen again with my vehicle I am left with more concerns that one who leases a new vehicle should be left with.

- Howard Beach, NY, USA

problem #2

Jan 312018


  • 2,290 miles
I pulled into our carport. It felt like the car just "sped up and went faster and faster." It hit the front of the car straight on. No airbags deployed nor did the front end collision stop happen.

- Payson, UT, USA

problem #1

Dec 202017


  • 1,500 miles
The first time while driving at 60 mph, the vehicle instrument panel warning lights activated and gauges fluctuated followed by acceleration, braking and steering movement. Then the information panel displayed stabilitrak unavailable, collision warning unavailable, lane change alert unavailable and transmission service. The car then started shifting erratically. The 2nd time same situation while driving 30-40 mph.

- O'fallon, MO, USA