Chevrolet 2005 Colorado Owner's Manual page 87

LOCK: Press this button to lock all the doors. The
parking lamps may also flash and the horn may chirp
when this button is pressed. Press the button again
within three seconds and the horn may chirp.
If a door is open or ajar when the lock button is pressed,
the horn will chirp several times to let you know that
the doors did not lock and the content theft-deterrent
system is not armed. Pressing the lock button again
while the horn is chirping or within three seconds after
the horn stops sounding, the doors will lock but the
content theft-deterrent system will not arm until
the opened door is closed.
You can program different feedback modes through the
Driver Information Center (DIC). To program the
feedback modes, see "Remote Keyless Entry Feedback"
under DIC Controls and Displays on page 3-36.
L
(Panic): Press this button to make the horn sound
and the headlamps and taillamps flash for up to
30 seconds. To turn them off again, do one of these
three things: wait for 30 seconds; press the panic button
again; or start the vehicle.
Matching Transmitter(s) to Your
Vehicle
Each remote keyless entry transmitter is coded to
prevent another transmitter from unlocking your vehicle.
If a transmitter is lost or stolen, a replacement can
be purchased through your dealer. Remember to bring
any remaining transmitters with you when you go to
your dealer. When the dealer matches the replacement
transmitter to your vehicle, any remaining transmitters
must also be matched. Once your dealer has coded the
new transmitter, the lost transmitter will not unlock
your vehicle. Each vehicle can have a maximum of four
transmitters matched to it.
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