2003 GMC Envoy Owner's Manual - Page 78

Power Door Locks The power door lock switches are located on the driver's and front passenger's armrests. Five seconds after the last door is closed, all the doors will lock. You can lock the doors immediately by using the power door lock switch or the optional remote keyless entry transmitter a second time. If the key is inserted in the ignition, this feature will not lock the doors. The lockout prevention feature will operate instead. You can enable or disable the delayed locking feature. If the feature is disabled, the doors will lock immediately when a power door lock switch or remote keyless entry transmitter lock button is pressed. Programming Delayed Locking Remove the ignition key and press the lock symbol to lock all of the doors at once. To unlock the doors, press the other side of the switch. When your vehicle was shipped from the factory, the delayed locking feature was programmed on, or enabled. The mode to which your vehicle was programmed may have been changed since it left the factory. To turn the delayed locking feature on or off, do the following: Delayed Locking This feature makes it easier to use the power door locks to lock all the doors and the liftgate when leaving your vehicle. The first time you attempt to 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. All doors and the liftgate can be reopened for up to five seconds from the time the last door is closed. 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 delayed locking feature was on, it would now be off. If the feature was off, it would now be on. 2-9