Matching Transmitter(S) To Your Vehicle; Battery Replacement - Buick 1999 Riviera Owner's Manual

Mode 5: Headlamps, parking lamps and cornering
lamps (if equipped) flash and horn chirps when locking;
exterior lamps flash when unlocking vehicle.
Vehicles are delivered programmed in Mode 5. To
change to another mode:
1. Turn the ignition key to OFF.
2. Press and hold LOCK on the driver's power door
lock switch throughout the procedure.
3. Press the trunk button on the transmitter to enter the
programming mode. The transmitter will remain in
its current mode.
4. Press the trunk button again. Each time the trunk
button is pressed, the horn will chirp and the
transmitter will advance to the next mode.
5. Release the power door lock switch.
This procedure changes the mode for only the
transmitter used to change this setting. The procedure
will need to be repeated for the second transmitter.

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 only four transmitters
matched to it.
See your dealer to match additional transmitters to
your vehicle.

Battery Replacement

Under normal use, the battery in your remote keyless
entry transmitter should last about two years.
You can tell the battery is weak if the transmitter won't
work at the normal range in any location. If you have to
get close to your vehicle before the transmitter works,
it's probably time to change the battery.
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