There are 4 owner-reported electrical system complaints for the 2017 GMC Sierrain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
AFTER USING THE REMOTE STARTER WHILE VEHICLE WAS PARKED IN MY DRIVEWAY, I STARTED TO DRIVE MY GRANDSON TO SCHOOL. A SHORT DISTANCE FROM HOME SMOKE AND SPARKS STARTED TO EMIT FROM THE REAR SEAT NEXT TO THE SLIDING WINDOW AND ELECTRIC REAR WINDOW DEFROSTER. AS I PULLED OVER THE REAR WINDOW PANEL ON THE PASSENGER SIDE BURST. I ASSUME FROM EXCESSIVE HEAT GENERATED BY THE REAR WINDOW DEFROSTER.
GMC HAS REFUSED TO FIND A FIX FOR THE HEATER CORD DEFECT WHICH IS ONE OF THE MAIN REASON WHY I PURCHASED THE VEHICLE. I LIVE IN IDAHO. GMC SHOULD COMPENSATE OWNERS UNTIL FIXED.
WHEN REVERSE IS ACTIVATED AT NIGHT, THE BACKUP CAMERA COMES ON AT FULL BRIGHTNESS AND IS NOT DIMMABLE. THE BRIGHT SCREEN PREVENTS VIEW OF THE PASSENGER SIDE MIRROR AND SIGNIFICANTLY REDUCES VISIBILITY IN THE DRIVER SIDE MIRROR WHILE REVERSING. THE SCREEN CANNOT BE DEACTIVATED AND BLINDS THE DRIVER. THIS IS AN ONGOING ISSUE.
WHEN REVERSE IS ACTIVATED AT NIGHT, THE BACKUP CAMERA COMES ON AT FULL BRIGHTNESS AND IS NOT DIMMABLE. THE BRIGHT SCREEN PREVENTS VIEW OF THE PASSENGER SIDE MIRROR AND SIGNIFICANTLY REDUCES VISIBILITY IN THE DRIVER SIDE MIRROR WHILE REVERSING. THE SCREEN CANNOT BE DEACTIVATED AND BLINDS THE DRIVER. THIS IS AN ONGOING ISSUE.
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