One problem related to cooling system hoses/lines/piping/fittings has been reported for the 2021 GMC Sierra 1500. The most recently reported issues are listed below.
The contact owns a 2021 GMC Sierra 1500. The contact stated while driving 15 mph and making a turn, the vehicle lost power steering assist functionality. Additionally, the brake pedal was depressed several times but failed to respond. The parking brake, traction control, brake, engine, and headlights warning lights were illuminated. The contact also stated that the warning message "limited power" was displayed. The contact stated that he depressed the brake pedal with his two feet from a standing position and the vehicle decelerated and he pulled into a driveway. The contact was able to continue to drive the vehicle. The vehicle was taken to the dealer who diagnosed that the vehicle software needed to be updated. The contact stated that the vehicle was repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 10,000.
| Engine And Engine Cooling problems | |
| Engine Shut Off Without Warning problems | |
| Cooling System Hoses/lines/piping/fittings problems | |
| Gas Recirculation Valve (egr Valve) problems | |
| Loud Engine Noise problems |