See also:

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position. The ignition should turn to LOCK/OFF only when the shift lever is in P (Park). ...

Navigation
OnStar navigation requires the Directions and Connections service plan. Push to receive directions or have them sent to the vehicle navigation screen. Destinations can also be forwarded to the v ...

Manual Operation
(Power): Press to turn the climate control system on or off. (Fan Control): Press to increase or decrease the fan speed. Pressing either button cancels automatic operation and the system goes into ...