United States 94V213000
General Motors, LLC
The problem
THE REAR BRAKE DRUMS WERE NOT CORRECTLY MACHINED. AS THE VEHICLE IS DRIVEN, LOSS OF WHEEL CLAMP LOAD CAN RESULT FROM THIS CONDITION. ONCE CLAMP LOAD IS LOST, ALL TIRE LOADS ARE DIRECTLY TAKEN BY THE WHEEL STUDS. THIS LOADING CAN CAUSE FATIGUE FAILURE OF THE WHEEL STUDS.
Risk
IF THIS OCCURS, A WHEEL COULD SEPARATE FROM THE VEHICLE, AND A CRASH COULD OCCUR WITHOUT PRIOR WARNING.
What owners should do
REPLACE REAR BRAKE DRUMS.
Units 435