GMC Canyon Owner's Manual page 102

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.
If a door is open or ajar when the lock button is
pressed, the horn will chirp several times to let you
know 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 194.
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.
102
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.