See also:

Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, please notify General Motors. Call 1-800-521-7300, or write: Buick Customer Assistance Center P.O. Box 33136 ...

Power Steering
If power steering assist is lost because the engine stops or the system is not functioning, the vehicle can be steered but it will take more effort. ...

Ending a Call
Turn the Menu knob to select Hang Up, then press SELECT. ...