2007 Chevrolet Silverado 2500 Pickup Owner's Manual - Page 122

Delayed Locking If your vehicle is a crew cab, it may have this feature. When locking the doors with the power lock switch or the Remote Keyless Entry (RKE) transmitter and a door is open, the doors will not lock until five seconds after the last door is closed. Three chimes will sound to signal that the delayed locking feature is in use. Pressing the power lock switch or the lock button on the RKE transmitter twice will override the delayed locking feature and immediately lock all the doors. You can turn the delayed locking feature off or back on again by doing the following: 1. Press and hold the power door lock switch in the lock position. 2. Press unlock twice on the RKE transmitter. This feature will not operate if the key is in the ignition. You can also program this feature using the DIC. See DIC Vehicle Customization on page 279. Programmable Automatic Door Locks Your vehicle may have an automatic lock/unlock feature which enables you to program your vehicle's power door locks. You can program this feature through the Driver Information Center (DIC), or by the following method. See DIC Vehicle Customization on page 279. Programmable Locking Feature Following are the two available programming options: Mode 1: All doors lock when the transmission is shifted into gear. This is the mode that is pre-programmed in the factory for your vehicle for automatic transmission vehicles. Mode 2: All doors lock when the vehicle speed is greater than 8 mph (13 km/h). This is the mode that is pre-programmed in the factory for manual transmission vehicles. The following instructions tell you how to change the automatic door lock mode (automatic transmission only). 122