GMC Express 2011 Owner's Manual page 37

Lockout Protection
This feature protects you from
locking the key in the vehicle
when the key is in the ignition and
a door is open.
If the power lock switch is pressed
when either the driver, passenger,
or rear door is open, all the doors
will lock and then the driver door will
unlock. This feature does not
include the side cargo door.
If the vehicle has an ambulance
package, this feature is disabled.
Safety Locks
Security locks are located on the
front portion of the 60/40 side
swing-out door or the side
sliding door.
60/40 Swing-Out Side
Door Driver Side Shown,
Passenger Side Similar
For the 60/40 side swing-out door,
move the button to the right for the
driver side door or to the left for the
passenger side door to engage the
security feature.
Keys, Doors and Windows
Move the button to the left for the
driver side door or to the right for
the passenger side door to return
the door locks to normal operation.
Side Sliding Door
For the side sliding door, move the
button up to engage the security
feature. Move the button down to
return the door locks to normal
operation.
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