Chevrolet 1998 Astro Owner's Manual page 90

Door Locks
I
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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 Remote Keyless
Entry. For more information, see "Remote Keyless
Entry" later in this section.
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.
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.
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