See also:

Ignition Positions (Key Access)
The ignition switch can be turned to four different positions. To shift out of P (Park), the ignition switch must be in ON/RUN or ACC/ACCESSORY and the brake pedal must be applied. Notice: ...

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 ...

Door Locks
To lock or unlock a door manually: Sedan and Wagon Base Model From the inside, use the door lock knob on the top of doors. Sedan and Wagon Uplevel Model From the inside, for a front door pull ...