Lockout Protection; Rear Doors - Chevrolet Silverado Classic 2007 Owner's Manual

4. Close the door.
5. Do the same thing to the other rear door.
The rear doors of your vehicle cannot be opened
from the inside when this feature is in use. If
you want to open the rear door while the security
lock is engaged, unlock the door and open the
door from the outside.

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.
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Rear Doors

Extended Cab
Your vehicle may have a rear access door(s) that
allows easier access to the rear area of the
extended cab.
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.