Buick 2002 Rendezvous - Manual (Page 116)

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When the content theft - deterrent system is armed,
the liftgate may be opened by using one of the
following methods:
D press the liftgate release
button, which is located
on the center console
switchbank, or
D press REAR on the optional remote keyless
entry transmitter.
Arming with the Power Lock Switch
Your alarm system will arm when you use either power
door lock switch to lock the doors while any door or the
liftgate is open and the key is removed from the ignition.
The security light will start flashing to let you know the
system is armed.
Arming with the Remote Keyless
Entry Transmitter
Your alarm system will arm after a 30 second delay
when you press LOCK on your remote keyless entry
transmitter to lock the doors. The security light will
come on for 30 seconds and then start flashing to let
you know the system is armed.