2009 Chevrolet Silverado 2500 HD Extended Cab Owner's Manual - Page 110

This feature will not operate if the key is in the ignition. You can program this feature using the Driver Information Center (DIC). See DELAY DOOR LOCK under DIC Vehicle Customization (With DIC Buttons) on page 3-76. Rear Door Security Locks Your vehicle has rear door security locks. These 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. Programmable Automatic Door Locks Vehicles with an automatic lock/unlock feature enable you to program the vehicle's power door locks. You can program this feature through the Driver Information Center (DIC). See DIC Vehicle Customization (With DIC Buttons) on page 3-76 for more information on DIC programming. The rear doors must be open to access them. The label showing lock and unlock positions is located near the lock. To set the locks, do the following: 1. Insert the key into the security lock slot and turn it so the slot is in the horizontal position. 2. Close the door. 2-10