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 or the power door lock switch. When the door is closed again, it will not lock automatically. Use the manual door lock or the power door lock switch to lock the door again.

Personalization Programming

You can program the automatic door lock 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).

Mode 4: All doors automatically lock when shifted out of PARK (P). Only the driver's door automatically unlocks when the key is turned to OFF (DIC equipped vehicles only).

Mode 5: All doors automatically lock when shifted out of PARK (P). All doors automatically unlock when the key is turned to OFF (DIC equipped vehicles only).

If your vehicle is equipped with the Driver Information Center (DIC), you must program this feature through the DIC. See DIC Vehicle Personalization .

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

  1. Keep all doors closed, the vehicle in PARK (P) and the ignition on throughout this procedure.
  2. Press and hold the driver's power door lock switch in LOCK through Step 3.
  3. Cycle the shift lever, starting in PARK (P), out of PARK (P) and then back into PARK (P), to advance by one mode for each cycle.
  4. After the first cycle, you will hear a door locking action, which identifies the current mode.

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

If your vehicle is equipped with remote keyless entry, use the following procedure to change modes:

  1. Keep all doors closed, the vehicle in PARK (P) and the ignition on throughout this procedure.
  2. Press and hold the driver's power door lock switch in LOCK through Step 4.
  3. Press the button with the lock symbol on the remote keyless entry transmitter. The automatic door locks will remain in the current mode.
  4. Press the button with the lock symbol on the transmitter again. Each time the transmitter's lock 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. (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 changes the mode for only the transmitter used to change this setting. The procedure will need to be repeated for the second transmitter.

Overriding Lock Delay

If you need to lock your doors before shifting out of PARK (P), just use the manual door lock or the power door lock switch to lock the doors.