Cadillac CATERA 1999, Owner'S Manual, Page: 72 / 328

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2. Remove the battery and replace it with a CR2032
battery. Using the wrong size battery can damage the
transmitter. Make sure the battery is positioned with
the “plus” (+) facing down.
3. Align the internal pieces of the transmitter, including
the cover. Snap together to reinstall.
Resynchronization
Pressing the transmitter buttons numerous times
(approximately 250 times) out of the vehicles operating
range may cause the transmitter not to work. Replacing
the battery and pressing the transmitter buttons 10 or
more times out of range will also cause the transmitter
not to work.
For vehicles with two transmitters:
To resynchronize the transmitter, you must be within the
vehicle’s operating range. Press and hold the trunk
button and within one second press the lock button.
For vehicles with four transmitters:
To resynchronize the transmitter, you must be within the
vehicle’s operating range. Press and hold the lock and
unlock buttons for approximately 5 to 10 seconds.
See your dealer for service if your transmitter still
doesn’t work properly.