GM Service Manual Online
For 1990-2009 cars only

Programmable automatic power door locks are a standard feature that is intended to provide enhanced security and convenience by automatically locking and unlocking doors.

Programmable Modes

Mode 1: No automatic door lock or unlock.

Mode 2: Automatic all-door lock when the transaxle is shifted out of PARK (P); no automatic door unlock.

Mode 3:  Automatic all-door lock when the transaxle is shifted out of PARK (P); automatic unlock for the driver's door only when the transaxle is shifted into PARK (P).

Mode 4: Automatic all-door lock when the transaxle is shifted out of PARK (P); automatic all-door unlock when the transaxle is shifted into PARK (P).

Your vehicle was originally programmed to Mode 4. The mode may have been changed since then. To determine the current mode, or to change the mode, see Vehicle Personalization .

Disconnecting the battery for up to a year will not change the programmed mode of the programmable automatic power door locks.