1996 GMC Yukon Owner's Manual - Page 67

From the inside, to lock the door, slide the lever your on door down. Rear Door Security Locks (4-DOor Utility) With this feature,you can lock the rear doors so they can't be opened from the inside by passengers. To unlock the door, slide the lever up. I Power Door Locks (Option) Press the side of the power security feature. Move the button up. to engage the door lock switch marked Move the button down to return the door locks to LOCK on either front door to lock all the doors at once. Press normal operation. of the ribbed side the switch to Leaving Your Vehicle unlock all the doors at once. If you are leaving the vehicle, take keys, open your your On four-door models, door and set the locks from inside. Then get out and theswitchoneachreardoor close the door. works only that door's lock. It won't lock (or unlock) al l of the doors -- that's'a safety feature. 2-3