United States 86V157000
General Motors, LLC
The problem
A CLAMP PINCH BOLT SECURING THE UPPER STEERING SHAFT TO THE LOWER STEERING SHAFT MAY LOOSEN. CONSEQUENCE OF DEFECT: SHAFTS COULD SEPARATE RESULTING IN LOSS OF TRUCK CONTROL WHICH COULD LEAD TO A CRASH WITHOUT PRIOR WARNING.
What owners should do
REPLACE THE CLAMP ASSEMBLY AND UPPER STEERING SHAFT.
Units 4779