There are 1 owner-reported speed control & cruise complaints for the 2018 GMC Terrainin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2018 GMC TERRAIN. THE CONTACT STATED THAT WHILE PULLING INTO A BUILDING PARKING WHILE DEPRESSING THE BRAKE PEDAL, THE VEHICLE ACCELERATED, THE CONTACT TURNED THE STEERING WHEEL AND MISSED HITTING THE BUILDING. THE CONTACT STATED THAT SHE WAS NOT ABLE TO CONTROL THE VEHICLE WHILE DEPRESSING THE BRAKE PEDAL, AS A RESULT, THE CONTACT CRASHED INTO A POST. IN ADDITION, THE CONTACT STATED THAT SHE SHIFTED INTO PARK, THE VEHICLE CONTINUE TO ROLLED. THE CONTACT ENGAGED THE EMERGENCY BRAKE AND THE VEHICLE CAME TO A STOP. THE CONTACT STATED THAT SHE DID NOT NOTICED ANY WARNING LIGHTS ILLUMINATED BECAUSE THE FAILURE OCCURRED FAST. THE CONTACT DID NOT SUSTAINED INJURIES. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO DON MOORE CHEVROLET BUICK GMC, 3232 VILLA POINT, OWENSBORO, KY 42303 (270) 215-1953, BUT WAS NOT YET DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND PROVIDED A CASE NUMBER. THE FAILURE MILEAGE WAS APPROXIMATELY 15,000. THE VIN WAS NOT AVAILABLE.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026