2007 GMC Sierra 1500 Pickup Owner's Manual - Page 123

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 282. 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). Choose one of the two programming options listed above before entering the program mode. To enter the program mode, do the following: 1. Begin with the ignition off. Then pull the turn signal/multifunction lever toward you and hold it there while you perform the next step. 2. Turn the key to RUN then back to LOCK twice. Then, with the key in LOCK, release the turn signal/multifunction lever. Once you do this, the doors will lock and unlock, the horn will chirp twice, and a 30-second timer will begin. You are now ready to program the automatic door lock feature. 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. 123