Power Door Locks - Chevrolet 2004 Silverado 1500 Pickup Owner's Manual

There are several ways to lock and unlock your vehicle.
You can use the keyless entry system, if equipped,
or you can also use your key.
2-8
To lock the door from the
inside, slide the lever
rearward. To unlock the
door, slide the lever
forward.

Power Door Locks

Press the recessed side of the switch with the unlock
symbol, to unlock all the doors at once.
If your vehicle has this
power door lock switch,
press the raised side of the
switch, with the lock
symbol, on either front
door to lock all the doors
at once.