GMC 2006 Sierra - Manual (Page 104)

Delayed Locking
If your vehicle is a crew cab, it may be equipped with this
feature. When locking the doors with the power lock
switch or the keyless entry transmitter and a door is open,
the doors will not lock until five seconds after the last door
is closed. You will hear three chimes to signal that the
delayed locking feature is in use.
Pressing the power lock switch or the lock button on the
keyless entry transmitter twice will override the delayed
locking feature and immediately lock all the doors.
You can turn the delayed locking feature off or back on
again by doing the following:
1. Press and hold the power door lock switch in the
lock position.
2. Press unlock twice on the remote keyless entry
transmitter.
This feature will not operate if the key is in the ignition.
You can also program this feature using the DIC.
See DIC Vehicle Customization on page 3-64.
Programmable Automatic Door
Locks
Your vehicle may be equipped with an automatic
lock/unlock feature which enables you to program your
vehicle’s power door locks. You can program this feature
through the Driver Information Center (DIC), or by the
following method. See DIC Vehicle Customization on
page 3-64.
Programmable Locking Feature
Following are the two available programming options:
Mode 1: All doors lock when the transmission is shifted
into gear. This is the mode that is pre-programmed in
the factory for your vehicle for automatic transmission
vehicles.
Mode 2: All doors lock when the vehicle speed is
greater than 8 mph (13 km/h). This is the mode that is
pre-programmed in the factory for manual transmission
vehicles.
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