2020 GMC Terrain Vehicle speed control Problems
- Complaints
- 11about this part
- Share
- 6%of 198 total for the year
- Median mileage
- 514miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 11 complaints about the vehicle speed control of the 2020 GMC Terrain, 6% of the 198 complaints for this model year. Where a mileage was given, the median is 514 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Purchased new 2020 Gmc Terrain w/7miles. Left dealership on my way home, and within 20 miles, received a message on dash-> service - ESC - dismiss. Check engine light flashed several times, and the SUV slowed down at least 10 miles from 65miles per hour. After engine light stopped blinking, I continues home around 30 miles more with no more problems. Called my sales person the next day, and he did not know what ESC was. (electronic stability control) he called me back and indicted the vehicle may need a software update. …”
NHTSA complaint #11373835, filed 2020-11, 27 miles“Random problems accelerating. Like I can be pulling out of my parking spot in revese then switch it to drive an try to move and it won’t move at all or very slowly then out of nowhere it accelerates fast”
NHTSA complaint #11731643, filed 2026-04“Dash had gone black intermittently, did not know what speed I was going. OnStar called oor phone multiple to notify us that our airbags we're offline for ten days no warning light on dash until one to two days later . Took to service was informed that gear shift control, engine control module, passenger presence module and airbag sensor needed replaced. All within a month of purchase of said USED vehicle. Vixed under warranty. …”
NHTSA complaint #11460096, filed 2022-04“Not long after I bought my 2020 GMC Terrain my adaptive cruise started disengaging. There are never any warning lights, except the noise and vibration of the seat before it shuts off then tells you it's disengaging. I didn't think anything of it until it's became a regular occurrence in the last month or two. I tell my dealership about it and they drive it but it never disengages on them, so they say nothing is wrong with my vehicle. …”
NHTSA complaint #11432173, filed 2021-09“Every week it's something different. In motion... No cruze control. No audio. Don't drive over 50mph brake problem. Parking brake engages randomly and without user engagement. No awd. No stability traction. This happens so frequently the dash indicators have been reduced to 'idiot lights'. At what point do I become concerned? Things appear to resolve when the engine is turned off and back on, sometimes....I compare it to other glitchy technology. …”
NHTSA complaint #11341949, filed 2020-07Related service bulletins
- 11014171Jan 31, 2025This service bulletin provides information on proper use of floor mats.
Vehicle speed control: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 3% |
| 2025 | 1 | 8% |
| 2024 | 3 | 6% |
| 2023 | 2 | 5% |
| 2022 | 1 | 2% |
| 2021 | 1 | 3% |
| 2020 | 11 | 6% |
| 2019 | 9 | 5% |
| 2018 | 8 | 4% |
| 2017 | 2 | 1% |
| 2016 | 4 | 3% |
| 2015 | 3 | 1% |
| 2014 | 3 | 1% |
| 2013 | 5 | 1% |
| 2012 | 11 | 3% |
| 2011 | 18 | 5% |
| 2010 | 17 | 6% |
Other parts of the 2020 GMC Terrain
73 complaintsEngine
58 complaintsOther or unknown
36 complaintsFuel system
31 complaintsTransmission and drivetrain
28 complaintsElectrical system
27 complaintsForward collision avoidance
8 complaintsBack-over prevention (rear camera)
6 complaintsBody and structure
5 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsAir bags
3 complaintsEngine cooling
3 complaints
← All problems reported for the 2020 GMC Terrain
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology