NHTSA Complaint #11681108 — 2021 CHEVROLET COLORADO

I own a 2021 Chevrolet Colorado Lt Extended Cab 2WD. The rear differential has failed prematurely at 70000 miles. the failure caused loud whining/grinding noises, vibration, and unsafe driving conditions. After researching online, i found many other 2021 Colorado owners reporting the same issue with rear differential failure, often at relatively low mileage. This indicates a widespread defect in the differential assembly. There are existing GM Technical Service Bulletins (20-NA-034, 20-NA-156) related to axle/differential noise and machining defects, but GM has not issued a recall or extended warranty coverage. Differential failure can lead to loss of power to the wheels or lockup while driving, which poses a serious safety risk. I request that NHTSA investigate this issue and require GM to issue a recall or Special coverage adjustment for the affected vehicles.