GM Service Manual Online
For 1990-2009 cars only

Rear Door Security Locks Crew Cab

If the vehicle is a crew cab model, it may have rear door security locks. With this feature, the rear doors are locked so they cannot be opened from the inside.


Object Number: 1240379  Size: A3

The rear door security lock is located on the inside edge of each rear door below the security lock label.

To engage the security locks:

  1. Open one of the rear doors.
  2. Using the ignition key, turn the lock to the horizontal position.
  3. Close the door.
  4. Repeat these steps on the other rear door.

To open a rear door when the security lock is on, unlock the door and open the door from the outside.

To disengage the security locks:

  1. Open one of the rear doors.
  2. Using the ignition key, turn the lock to the vertical position.
  3. Close the door.
  4. Repeat these steps on the other rear door.