GMC YUKON DENALI 1999 Owner's Manual page 82

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Mode 2: Horn and Lamps/Lamps (Your horn will sound
briefly and your headlamps and parking lamps will flash
when you press LOCK on the keyless entry transmitter.
Only your headlamps and parking lamps will flash when
you press UNLOCK.)
Mode 3: Horn and Lamps (Your horn will sound briefly
and your headlamps and parking lamps will flash every
time you push LOCK or UNLOCK.)
Mode 4: Lamps (Your headlamps and parking lamps
will flash every time you press LOCK or UNLOCK.)
Mode 5: Lamps/Horn and Lamps/Lamps (Your
headlamps and parking lamps will flash upon the first
press on LOCK, your headlamps and parking lamps will
flash and your horn will sound upon the second press on
LOCK and your headlamps and parking lamps will flash
upon any press on UNLOCK.)
Theft-Deterrent Arming Method
Your vehicle comes with this feature set in Mode 3. This
means that both your keyless entry transmitter and the
power door lock switch will actively arm the system. To
change the factory setting, do the following:
1. Press the UNLOCK switch on the door.
2-18
2. Count the number of chimes you hear. The number
of chimes tells you which mode your vehicle is
set for.
3. Press the UNLOCK switch on the door until you
hear the number of chimes that correspond to the
mode selection you want.
Mode 1: Alarm System Off (The system will not arm.)
Mode 2: Keyless Entry Transmitter Lock (When you
lock your doors using the keyless entry transmitter, the
system will arm.)
Mode 3: Keyless Entry Transmitter/Power Door Lock
Switch (If you use either the keyless entry transmitter or
the power door lock switch to lock the doors, the system
will arm.)
Mode 4: Passive arming and Keyless Entry
Transmitter/Power Door Lock Switch Arming (The
system will arm itself after all doors are closed, plus
arming per mode 3.)
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