GM Service Manual Online
For 1990-2009 cars only

The vehicle is programmed to lock all doors automatically when the following are met:

    • All doors are closed.
    • The ignition is on.
    • The vehicle is shifted out of (P) Park.

This feature cannot be disabled.

All doors will unlock when the vehicle is shifted into (P) Park.

The power door unlock function can be programmed through prompts displayed on the Driver Information Center (DIC). See DIC Vehicle Personalization.