2003 GMC Yukon Owner's Manual - Page 103

Delayed Locking When you lock the doors using the power lock switch or the remote keyless entry transmitter with any door or the liftgate open three chimes will signal that delayed locking is being used. Five seconds after the last door is closed, all the doors will lock. All doors and liftgate can be re-opened for up to five seconds from the time the last door is closed. You can lock the door immediately using the power door lock switch or the optional remote keyless entry transmitter a second time. This feature will not lock the doors if the key is in the ignition. To enable or disable the delayed locking feature, do the following: 1. Press and hold the power door lock switch on the driver's door in the lock position. 2. Press the remote keyless entry transmitter unlock button twice. If the feature is disabled, the doors will lock immediately when a power door lock switch or remote keyless entry transmitter button is pressed. Programmable Automatic Door Locks Your vehicle may be equipped with 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. Programmable Locking Feature The following is the list of 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. 2-9