GMC 2007 Envoy - Manual (Page 105)

Rear Door Security Locks
Your vehicle may have this feature. You can lock
the rear doors so they cannot be opened from
the inside by passengers. To use one of
these locks do the following:
1. Open one of the rear doors. You will find a
security lock lever located on the inside
edge of each rear door.
2. Move the lever
down to engage the
security lock.
Move the lever up to
disengage the
security lock.
3. Close the door.
The rear doors of your vehicle cannot be opened
from the inside while this feature is in use. If
you want to open the rear door while the security
lock is on, unlock the door and open the door
from the outside.
Lockout Protection
This feature stops the power door locks from
locking when the key is in the ignition and a door
is open to protect you from locking your key in
the vehicle.
If the power lock switch is pressed when a door is
open and the key is in the ignition, all the doors
will lock and then the driver’s door will unlock.
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