2018 GMC Terrain Suspension Problems
- Complaints
- 3about this part
- Share
- 1%of 226 total for the year
- Median mileage
- 11,950miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the suspension of the 2018 GMC Terrain, 1% of the 226 complaints for this model year. Where a mileage was given, the median is 11,950 miles. 1 of these say a crash was involved, 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.
“The vehicle was in motion making a right hand turn and in the turn the operator lost control of the vehicle causing her to strike a curb then head for oncoming traffic. When it was all said and done it looked like the ball joint had failed causing the loss of control. A bystander said he heard a loud pop and looked up and witnessed the vehicle slide into the curb and then see the front left tire lock up and the vehicle come to a stop.”
NHTSA complaint #11209117, filed 2019-05, 11,950 miles“Dear [Manufacturer], I am writing to report a serious safety concern with my [year, make, model]. A bolt from the idler arm/undercarriage came off after becoming severely rusted. I had the vehicle inspected by a repair shop, but they could not determine why the bolt failed or why it had rusted to this extent. This is extremely concerning because a failure of this component while driving could potentially result in loss of control and a serious accident. I am asking the manufacturer to investigate this issue and determine whether this is a known defect or corrosion-related problem. …”
NHTSA complaint #11767009, filed 2026-09Related service bulletins
- 11019516Apr 17, 2025This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- 11015409Feb 25, 2025This service bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
- 11007936Aug 22, 2024This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
- 11007935Aug 22, 2024This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
- 11000119Apr 26, 2024This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10247352Nov 14, 2023This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer?s…
Suspension: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 5 | 15% |
| 2025 | 2 | 15% |
| 2022 | 1 | 2% |
| 2021 | 2 | 6% |
| 2020 | 2 | 1% |
| 2019 | 3 | 2% |
| 2018 | 3 | 1% |
| 2016 | 1 | 1% |
| 2015 | 1 | 0% |
| 2014 | 1 | 0% |
| 2013 | 7 | 2% |
| 2012 | 4 | 1% |
| 2011 | 5 | 1% |
| 2010 | 3 | 1% |
Other parts of the 2018 GMC Terrain
83 complaintsEngine
55 complaintsTransmission and drivetrain
42 complaintsOther or unknown
36 complaintsElectrical system
35 complaintsFuel system
17 complaintsAir bags
14 complaintsForward collision avoidance
8 complaintsVehicle speed control
8 complaintsElectronic stability control
7 complaintsSteering
7 complaintsVisibility (wipers, defrost, mirrors)
5 complaints
← All problems reported for the 2018 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