2003 Chevrolet Avalanche Owner's Manual - Page 84

Rear Door Security Locks With this feature, you can lock the rear doors so they can't be opened from the inside by passengers. This feature is located on the inside edge of the rear doors. To use one of the locks, do the following: 1. Open one of the rear doors. 2. Move the lever forward to engage the rear door security iock. 3. Close the door. 4. Do the same thing to the other rear door. The rear doors or your vehicle cannot be opened from the inside when this feature is in use. If you want to open the rear door while the security lock is engaged, unlock the door and open the door from the outside. Move the lever rearward to disengage the child security lock feature. 2-11