2020 GMC Terrain Body and structure Problems
- Complaints
- 5about this part
- Share
- 3%of 197 total for the year
- Median mileage
- 41,150miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the body and structure of the 2020 GMC Terrain, 3% of the 197 complaints for this model year. Where a mileage was given, the median is 41,150 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.
“I noticed a sticker in driver door stating recall however no evidence. The vehicle will not pull hills, back up on a hill and will not accelerate over 25 miles per minute. Dangerous to drive on roads. Took vehicle to a GMC dealer for diagnostic test, received the report for what the report found. Took the report to auto shop to get repaired however the vehicle still continues with same issue. Took the vehicle to another auto shop. I was informed of some differences added issues. I had those issues fixed. The vehicle still running the exact way after all of the repairs. …”
NHTSA complaint #11713540, filed 2026-01“The complaint I have is the inside front of the car is too small and I cant reach the gas pedal except with my toe. My foot keeps slipping off as I am driving. I have to have the seat way up or I cant reach. I am 5 foot tall woman. This is a ridiculous thing that I have to put up. I drove it for 10 minutes and didn't realize it. I asked for a pedal that is longer and closer to the floor after I had bought it and service people told me they don't have anything to do to fix it. They asked if I had a button to adjust it and I don't. Its on the expensive one. …”
NHTSA complaint #11316405, filed 2020-03“The contact owns a 2020 GMC Terrain. The contact stated that rain water had leaked from the sunroof drainage into the vehicle causing the floor carpets to become saturated with water and mold had developed inside the vehicle. The contact also discovered a pool of water inside the spare tire well. The vehicle was taken to the local dealer who replaced the sunroof motor and sunroof liner, unclogged the sunroof drainage assembly and replaced the carpets. …”
NHTSA complaint #11631628, filed 2024-12, 12,300 miles“The contact owns a 2020 GMC Terrain. The contact stated while the vehicle was parked, the contact noticed that the tire well was filled with water. The contact stated that the unknown box on the side was filled with water. In addition, the contact stated that the water dripped onto the ground underneath the rear tire. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 70,000.”
NHTSA complaint #11737045, filed 2026-05, 70,000 miles“After heavy rain the backseat of the car was flooded as well as the rear wheel well likely due to the sunroof not draining properly. This led to electrical failure of the sunroof mechanism and potential to damage other electrical elements. This will be looked at by the dealership but have read that this is a known issue.”
NHTSA complaint #11541554, filed 2023-08Related service bulletins
- 11015382Feb 20, 2025This informational bulletin provides a procedure on how to remove the paint stain that may present itself under the shipping film.
- 11014171Jan 31, 2025This service bulletin provides information on proper use of floor mats.
- 11014238Jan 30, 2025This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
- 11013269Jan 16, 2025This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.
- 11011853Nov 14, 2024This technical bulletin provides a procedure to correct a customer concern of a High Pitch Whine Noise Coming from Front Instrument Panel (IP) Speakers.
- 11011709Nov 5, 2024This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11010493Oct 5, 2024This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
- 11009764Sep 21, 2024This service bulletin provides information on Concerns or Questions Regarding Installation of Dealer Installed Accessories.
- 11007724Aug 14, 2024This technical bulletin provides repair information to correct a customer concern of Vehicle Will Lock and Unlock (Active Functions Work) but Will Not Crank or Start (Loss of…
- 11001782May 31, 2024This technical bulletin provides a procedure to replace the charge air cooler due to moisture getting inside of it and causing a malfunction indicator lamp illuminated with DTC…
Body and structure: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 2 | 6% |
| 2025 | 1 | 8% |
| 2024 | 1 | 2% |
| 2023 | 1 | 2% |
| 2020 | 5 | 3% |
| 2019 | 2 | 1% |
| 2018 | 3 | 1% |
| 2017 | 7 | 5% |
| 2016 | 3 | 2% |
| 2015 | 14 | 5% |
| 2014 | 5 | 2% |
| 2013 | 14 | 4% |
| 2012 | 12 | 3% |
| 2011 | 11 | 3% |
| 2010 | 10 | 3% |
Other parts of the 2020 GMC Terrain
72 complaintsEngine
58 complaintsOther or unknown
36 complaintsFuel system
31 complaintsTransmission and drivetrain
28 complaintsElectrical system
27 complaintsVehicle speed control
11 complaintsForward collision avoidance
8 complaintsBack-over prevention (rear camera)
6 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 27, 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