What's Wrong with the 2nd Generation (2018–2021) Terrain?

Terrain owners have made 12 complaints about the 2018–2021 model years. Using our PainRank™ system we've ranked it 17th out of 32 GMC generations in overall reliability, with some electrical and interior concerns.

Compare With Other Terrain Generations

What Owners Complain About

Sometimes it helps just to tally up the complaints and see where the biggest stacks are. Use this information to learn about troublespots or to run for the hills.

Worst Issues

What Breaks the Most

Years to Avoid

2nd Generation (2018–2021) Terrain Key Numbers

  1. 2 model years

    Grouping all models by their year can reveal some baddies.

  2. 12 complaints

    Running tally of owner grievances filed to CarComplaints.com.

  3. 17th in reliability

    Overall reliability rank out of 32 eligible generations.

Recent 2nd Generation (2018–2021) Terrain News

There's a lot of news out there, but not all of it matters. We try to boil down it to the most important bits about things that actually help you with your car problem. Interested in getting these stories in an email? Signup for free email alerts over at CarComplaints.com.

  1. GM says it needs to bleed the brake systems of 230,000 previously recalled cars.

    Some of the recalled vehicles have rear brake caliper pistons that have hydrogen gas trapped inside that could be released into the brake systems. ZF, the manufacturer of the brake pistons, didn't properly temper and chrome-coat the pistons, causing hydrogen gas to remain trapped in the bodies of the pistons.

    Excess gas –– we’ve all had it, no-one likes it, and the same holds true for your braking system. This problem may cause your brake pedal to feel “spongy” but it’s unclear if it affects stopping distances.

    keep reading article "Excess Gas Buildup in the Terrain's Brake Caliper Pistons"