See also:

Vehicle Reminder Messages
ICE POSSIBLE DRIVE WITH CARE This message displays when ice conditions are possible. ...

Traction Control System (TCS)
The vehicle has a Traction Control System (TCS) that limits wheel spin. This is especially useful in slippery road conditions. On a rear-wheel-drive vehicle, the system operates if it senses ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...