Table 1 shows one common suspension related problems of the 2026 GMC Terrain.
| Problem Category | Number of Problems |
|---|---|
| Suspension problems |
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.
Shimmy, shake, wobble, after TSB 26-na-109 repair, replace front springs, vehicle feels less stable at highway speeds. The initial condition, shimmy, shake, wobble, under moderate acceleration, still exists after last repair attempt.
The contact owns a 2026 GMC Terrain. The contact stated that there was an abnormal clunking sound coming from the front driver’s side suspension while driving over bumps in the roadway, and while braking and turning the steering wheel. No warning lights were illuminated. The vehicle was taken to a local dealer, where a test drive was performed; however, the dealer was unable to determine the cause of the failure. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 14.
Vehicle “wobble” under moderate acceleration and in corners, can be felt in the seats and steering wheel.
Car aggressively shakes and steering wheel shakes / jerks itself side to side when accelerating. Getting worse with time. GMC has it as a known issue but has been for months. Problem is getting worse the more it is driven. GMC says it is “safe”.