2018 GMC Terrain service brakes problems
66 owner complaints filed with NHTSA name the service brakes on the 2018 GMC Terrain — 31% of all complaints for this model year.
What owners report
“Vehicle would slowly roll even when break is applied. It was confirmed by the service center that the break booster vacuum pump was only reading 8 when it should be at 27. It was not making enough pressure. The vehicle would not stop when break was applied.”
filed Jul 22, 2026
“The vehicle has had regular maintenance, oil change, and inspection including the brakes. My boyfriend is visiting me in [XXX] from the [XXX]. OnXXX while driving the vehicle the engine started. Making a ticking noise especially during idle and when accelerating in idle. About 15 minutes after the…”
filed Jul 17, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Rear brake caliper pistons may have an insufficient coating causing gas pockets to form…Campaign 18V576000 · Aug 30, 2018
Service Brakes problems in other Terrain years
| Year | Reports | Share |
|---|---|---|
| 2026 Terrain | 3 | 13% |
| 2024 Terrain | 2 | 4% |
| 2022 Terrain | 1 | 2% |
| 2021 Terrain | 8 | 24% |
| 2020 Terrain | 61 | 33% |
| 2019 Terrain | 58 | 33% |
| 2017 Terrain | 2 | 2% |
| 2016 Terrain | 5 | 3% |
| 2015 Terrain | 8 | 3% |
| 2014 Terrain | 9 | 3% |
| 2013 Terrain | 7 | 2% |
| 2012 Terrain | 5 | 1% |
Other reported problem areas on the 2018 GMC Terrain
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.