Chevrolet TrailBlazer 2003 Manual page 75

Power Door Locks
Remove the ignition key and press the lock symbol to
lock all of the doors at once. To unlock the doors, press
the other side of the switch.
Delayed Locking
This feature makes it easier to use the power door locks
to lock all the doors and the liftgate when leaving your
vehicle.
The first time you attempt to lock the doors using the
power lock switch or the remote keyless entry
transmitter (with a door or the liftgate open), three
chimes will signal that delayed locking is being used. All
doors and the liftgate can be reopened for up to five
seconds from the time the last door is closed.
The power door lock
switches are located on
the driver's and front
passenger's armrests.
Five seconds after the last door is closed, all the doors
will lock. You can lock the doors immediately by
using the power door lock switch or the optional remote
keyless entry transmitter a second time.
If the key is inserted in the ignition, this feature will not
lock the doors. The lockout prevention feature will
operate instead.
You can enable or disable the delayed locking feature.
If the feature is disabled, the doors will lock immediately
when a power door lock switch or remote keyless
entry transmitter lock button is pressed.
Programming Delayed Locking
When your vehicle was shipped from the factory, the
delayed locking feature was programmed on, or
enabled. The mode to which your vehicle was
programmed may have been changed since it left the
factory. To turn the delayed locking feature on or off, do
the following:
1. Press and hold the power door lock switch on the
driver's door in the lock position.
2. Press the remote keyless entry transmitter unlock
button twice.
If the delayed locking feature was on, it will now be off.
If the feature was off, it will now be on.
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