There are 3 owner-reported brakes complaints for the 2020 GMC Acadiain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
On multiple occasions the car will suddenly brake or like throw on the parking brake and stop suddenly no warning
TL* THE CONTACT OWNS A 2020 GMC ACADIA. THE CONTACT STATED THAT WHILE DRIVING AT 15 MPH, WITHOUT WARNING THE PARKING BRAKE ENGAGED INDEPENDENTLY. THE CONTACT MANUALLY RELEASED THE PARKING BRAKE AND THE VEHICLE OPERATED AS INTENDED. DEALER RUSTY WALLACE KIA LOCATED AT (300 KING AVE, MORRISTOWN, TN 37814, (800) 458-0302) WAS CONTACTED AND INFORMED OF THE FAILURE. AN APPOINTMENT WAS SCHEDULED TO HAVE THE VEHICLE DIAGNOSED WHICH WAS STILL PENDING. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE, BUT NO FURTHER ASSISTANCE WAS PROVIDED. THE FAILURE MILEAGE WAS APPROXIMATELY 6,276.
RECENTLY PURCHASED A 2020 ACADIA DENALI. WHEN PARKING AT ANY INCLINE THE PARKING BRAKE AUTOMATICALLY TURNS ON. DEALER IS NOT SURE WHY, BUT NO WHERE IN THE MANUAL DOES IT STATE THIS IS NORMAL. TO DISENGAGE BRAKE VEHICLE HAS TO BE PUT IN GEAR WITH FOOT ON BRAKE TO TURN OFF. THE PARKING BRAKE SHOULD TURN OFF WHEN VEHICLE IS IN PARK WITH FOOT ON BRAKE BUT IT DOES NOT. DEALER IS UNSURE OF ISSUE AND HAS AN OPEN CASE WITH GMC TO INVESTIGATE.
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 25, 2026