Defect
On certain vehicles, the bolts that attach the electric power steering assist motor to the steering gear may corrode and break. This could cause a loss of power steering assist.
Safety Risk
A loss of power steering assist may result in a sudden increase in steering effort, especially at low vehicle speeds. This could increase the risk of a crash.
Remedy
General Motors will notify owners by mail and instruct you to take your vehicle to a dealer to replace the bolts that attach the electric power steering motor and apply a protective wax coating. If the bolts cannot be removed due to corrosion, the steering gear will be replaced.