See also:

OnStar®
OnStar® uses several innovative technologies and live advisors to provide a wide range of safety, security, navigation, diagnostics, and calling services. ...

Towing
General Towing Information The vehicle is neither designed nor intended to tow a trailer. ...

Reducing Speed While Using Cruise Control
If the cruise control system is already activated: • Move the thumbwheel toward SET/− and hold until the desired lower speed is reached, then release it. • To slow down in small am ...