2000 Buick Regal Owner's Manual - Page 80

4. Test the operation of the transmitter with your vehicle. If the transmitter does not work, try resynchronizing the transmitter. (See "Resynchronization" following.) 5. Resynchronize and then test the transmitter. Resynchronization Resynchronization may be necessary due to the security method used by this remote keyless entry system. The transmitter does not send the same signal twice to the receiver. The receiver will not respond to a signal it has previously been sent. This prevents someone from recording and playing back the signal from the transmitter. To replace the battery: 1. Insert a flat object like a dime into the slot on the back of the transmitter. Gently pry apart the front and back. 2. Remove the old battery and replace it with the new one. (Use type CR2032 or an equivalent.) Make sure the positive (+) side of the battery is facing down. Do not use a metal object to remove the old battery. 3. Snap the top and bottom together, making sure the halves are together tightly so water won't get in. To resynchronize the transmitter with the receiver, do the following: 1. Stand close to your vehicle. 2. Simultaneously press and hold the LOCK and UNLOCK buttons on the transmitter for about seven seconds. There will be an audible confirmation when resynchronization is done. If the locks do not cycle, see your dealer for service. 2-13