Lockout Protection; Rear Doors - Chevrolet Silverado 2004 Owner's Manual

Lockout Protection

This feature protects you from locking your key in the
vehicle when the key is in the ignition and a door
is open.
If the power lock switch is pressed when a door is open
and the key is in the ignition, all of the doors will lock
and then the driver's door will unlock.

Rear Doors

Extended Cab
Your vehicle may be equipped with a rear access
door(s) that allows easier access to the rear area
of the extended cab.
2-14
You must fully close a rear access door before you can
close the front door.
To open a rear access
door from the outside,
first open the front door.
Then, use the handle
located on the front edge
of the rear access door
to open it.