See also:

Curve Tips
Take curves at a reasonable speed. Reduce speed before entering a curve. Maintain a reasonable steady speed through the curve Wait until the vehicle is out of the curve before accelerating ge ...

Unable to Connect to OnStar Message
If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push to try the call again or try again after driving a few miles into ...

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...