2001 GMC Yukon Owner's Manual - Page 85

If your vehicle has this power door lock switch, press the bottom of the switch on either front door to lock all the doors at once. If the rear lock switch is pressed with the rear doors open, all of the doors will lock five seconds after the cargo doors are closed. The power door locks will operate at any time without the ignition being on. Operating the power locks may interact with the theft-deterrent system (if equipped). See "Content Theft-Deterrent" in the Index. Programmable Automatic Door Locks Your vehicle is equipped with an auto lock/unlock feature which enables you to program your power door locks. Your vehicle left the factory programmed to have the automatic lock feature lock all the doors when the vehicle speed is greater than 15 mph (24 km/h) for two seconds, and then unlock all the doors once the key is removed from the ignition. The following instructions detail how to program your door locks. To enter the program mode you need to: 1. Beginning with the ignition in OFF, pull back on the turn signal/multifunction lever all the way toward you and hold it while you perform the next step. 2. Turn your key to ON and OFF twice. Then, with the key in OFF, release the turn signal/multifunction lever. Once you do this, you will hear the lock switch lock and unlock. Press the top of the switch to unlock all the doors at once. On the passenger side of the rear cargo door or liftgate opening trim there is a power lock switch which can be used to lock or unlock all of the doors. 2-7