1999 Chevrolet Astro Owner's Manual - Page 76

yellowblue Door Locks CAUTION: Unlocked doors can be dangerous. Passengers -- especially children -- can easily open the doors and fall out. When a door is locked, the inside handle won't open it. Outsiders can easily enter through an unlocked door when you slow down or stop your vehicle. This may not be so obvious: You increase the chance of being thrown out of the vehicle in a crash if the doors aren't locked. Wear safety belts properly, lock your doors, and you will be far better off whenever you drive your vehicle. There are several ways to lock and unlock your vehicle. Your vehicle may be equipped with the Keyless Entry System. For more information, see "Keyless Entry System" in the Index. To unlock your door from the outside, use your key. To lock the front doors and sliding side door from the inside, slide the lock levers down. To unlock the front doors and the sliding side door from the inside, slide the lock levers up. When the red mark on the lock lever is visible, the door is unlocked. Power Door Locks (If Equipped) If your vehicle has power door locks, press the power door lock switch to lock or unlock all the doors at once. 2-6