1997 GMC Suburban Owner's Manual - Page 77

Your vehicle has one double-sided key for the ignition and all door locks. Door Locks A CAUTION: Unlocked doors can be dangerous. Passengers especially children can easily open the doors and fall out. When a door is locked, the inside handlewon't openit. Outsiders can easily enter through an unlocked door when you slow down stop your vehicle. or This may not be obvious: You increase the so chance of being thrown out of the vehicle in a crash if the doors aren't locked. Wear safety belts properly, lock your doors, you will befar and better off whenever youdrive your vehicle. -- -- If you ever loseyour key, your dealer will be able to assist you with obtaining anew one. There are several ways to lockand unlock your vehicle. From the outside, use your key. 2-3