GM Service Manual Online
For 1990-2009 cars only

Rear door security locks prevent passengers from opening the rear doors from the inside.

The rear door security locks are located on the inside edge of each rear door. The rear doors must be opened to access them.

To assist in finding the lock, the vehicle has the following:


Object Number: 1799378  Size: A3

To use the lock:

  1. Insert the key into the security lock slot and turn it so the slot is in the horizontal position.
  2. Close the door.
  3. Do the same for the other rear door.

To open a rear door when the security lock is on, do the following:

  1. Unlock the door using the Remote Keyless Entry (RKE) transmitter, if the vehicle has one, the power door lock switch, or by lifting the rear door manual lock.
  2. Open the door from the outside.

To cancel the rear door security lock:

  1. Unlock the door and open it from the outside.
  2. Insert the key into the security lock slot and turn it so the slot is in the vertical position.
  3. Do the same for the other rear door.