GM Service Manual Online
For 1990-2009 cars only

Close the doors and turn on the ignition. Every time you move the shift lever out of PARK (P), all of the doors will lock. And, every time you stop and move the shift lever into PARK (P), the doors will unlock. If someone needs to get out while you're not in PARK (P), have that person use the manual door lock control or power door lock switch. When the door is closed again, it will not lock automatically. If you need to lock the doors before shifting out of PARK (P), use the manual door lock control or power door lock switch.

Personalization Programming

You can program the automatic door locks feature to change to the following modes:

Mode 0: No automatic door lock or unlock.

Mode 1: All doors automatically lock when shifted out of PARK (P). No automatic door unlock.

Mode 2: All doors automatically lock when shifted out of PARK (P). Only the driver's door automatically unlocks when shifted into PARK (P).

Mode 3: All doors automatically lock when shifted out of PARK (P). All doors automatically unlock when shifted into PARK (P).

If your vehicle is equipped with the DIC, you must use it to program this feature. See Driver Information Center (DIC) .

If your vehicle is not equipped with the DIC, use the following procedure to change modes:

  1. Close all the doors and turn the ignition on. Keep all doors closed throughout this procedure.
  2. Press and hold LOCK on the driver's power door lock switch throughout this procedure. All the doors will lock.
  3. Press the lock button on the remote keyless entry transmitter. The automatic door locks will remain in the current mode.
  4. Press the lock button on the transmitter again. Each time this button is pressed, the mode will advance by one, going from 3 to 0 to 1, etc.
  5. The door locks will cycle according to the mode entered while customizing the memory door locks. (Mode 0 has no feedback.)

  6. Release the power door lock switch. The automatic door locks will remain in the most recent mode selected.

This procedure only changes the mode for the transmitter used to change this setting.