GM Service Manual Online
For 1990-2009 cars only

Object Number: 1306949  Size: A2

If your vehicle has power door locks, the switches are located on the driver's and the front passenger's armrests.

Remove the ignition key and press L (lock) to lock all the doors at once. To unlock all the doors, press U (unlock).

On crew cab models, use the manual door lock lever on each rear door to lock or unlock the doors from the rear seating area.