2026 GMC Terrain Other or unknown Problems
- Complaints
- 9about this part
- Share
- 27%of 33 total for the year
- Median mileage
- —not reported
- Trend
- Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA recorded 9 complaints about the other or unknown of the 2026 GMC Terrain, 27% of the 33 complaints for this model year. 1 a fire, according to the filers.
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 bought this car new from Davidson's in Rome, NY in early March 2026. This is a 2026 model. Two days after I took possession, I noticed that the spare tire well was halfway full of solid ice. The car has a severe leak through the back right side window. The dealer states it needs to be replaced. The interior frames of the car were loaded with water for many weeks as it stood on the lot. …”
NHTSA complaint #11732320, filed 2026-04“I have brand new GMC Terrain 2026, I leased dog on Aug 4th 2025. After one week into driving the vehicle, OnStar, GPS NAV stopped working and the Emergency calling is not working. All features related to locating the vehicle through OnStar or through google stopped working, in addition to SoS not working. I took it to the dealership they said the Telematics module needs replacement.”
NHTSA complaint #11682985, filed 2025-08“The Screen calls my own phone number and hangs up over and over if I just ended a call. I am not able to use any part of the screen afterwards such as my map. It stays like that until I disconnect the Bluetooth and wifi from my phone while trying to drive. Safety issue!”
NHTSA complaint #11748887, filed 2026-07“My vehicle is making a squeaky sound/noise when breaking and getting louder. I took it in for service and they couldn’t seem to find the issue. It’s coming from the front end of the vehicle”
NHTSA complaint #11765446, filed 2026-09“The vehicle has been taken to the dealership at least 4 times. Each time for the same reason: when driving at 65 or higher, it sounds like it's on a flat. My screen also glitches when foot is taken off the break after a stop. The service advisor told me that there was a shortage of mechanics and asked me to bring it back next week (this is the response I have gotten each time). I have asked for a loaner twice and was told that there were none available. Therefore, I had to pay $40 to uber to work. Today, I said that I couldn't come back because it's the same issue and I have to work next week. …”
NHTSA complaint #11707645, filed 2025-12Related service bulletins
- 11038744Oct 24, 2026This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener and to replace the opener with a new updated part.
- 11038595Oct 17, 2026This Preliminary information communicates the potential for shudder and all cylinder misfire concerns on RPO LSD
- 11038588Oct 15, 2026This Preliminary Information, describes a condition where the HVAC will make noise when changing modes while HVAC is warm. Engineering is aware and no fix available at the time.
- 11038584Oct 15, 2026This Preliminary information describes an issue where the fuel pump makes a loud noise that engineering is currently investigating.
- 11038136Sep 28, 2026This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to…
- 11038132Sep 28, 2026This Preliminary information communicates to dealers a procedure to reset the radio.
- 11037797Sep 28, 2026This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener. Engineering is working on a new module.
- 11037555Sep 26, 2026This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- 11037320Sep 10, 2026This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
- 11037253Sep 4, 2026This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 9 | 27% |
| 2025 | 2 | 15% |
| 2024 | 13 | 24% |
| 2023 | 7 | 17% |
| 2022 | 9 | 15% |
| 2021 | 4 | 11% |
| 2020 | 36 | 18% |
| 2019 | 21 | 11% |
| 2018 | 36 | 16% |
| 2017 | 20 | 15% |
| 2016 | 13 | 9% |
| 2015 | 21 | 7% |
| 2014 | 16 | 5% |
| 2013 | 27 | 7% |
| 2012 | 37 | 10% |
| 2011 | 34 | 9% |
| 2010 | 18 | 6% |
Other parts of the 2026 GMC Terrain
6 complaintsElectrical system
5 complaintsSuspension
5 complaintsTransmission and drivetrain
5 complaintsBrakes
4 complaintsWheels
4 complaintsSteering
3 complaintsLane departure
2 complaintsBody and structure
2 complaintsBack-over prevention (rear camera)
1 complaintsEngine
1 complaintsLatches, locks and linkages
1 complaints
← All problems reported for the 2026 GMC Terrain
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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