2000 Cadillac Catera Owner's Manual - Page 75

Resynchronization Pressing the transmitter buttons numerous times (approximately 250 times) out of the vehicle's 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. 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. 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. 2-10