OnStar Services

See also:

Steering
Hydraulic Power Steering Your vehicle has hydraulic power steering. It may require maintenance. See Power Steering Fluid. If power steering assist is lost due to a system malfunction, the vehic ...

Rainsense™
For vehicles with Rainsense, a sensor located near the top center of the windshield detects the amount of water on the windshield and automatically controls the frequency of the windshield w ...

Starting the Vehicle Messages
PRESS BRAKE TO START VEHICLE This message is displayed when attempting to start the vehicle without first pressing the brake pedal. SERVICE KEYLESS START SYSTEM This message is displayed if ...