1999 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 80

yellowblue To replace the battery in the keyless entry transmitter: Resynchronization Resynchronization may be necessary due to the security method used by this system. The transmitter does not send the same signal twice to the receiver. The receiver will not respond to a signal that has been sent previously. This prevents anyone from recording and playing back the signal from the transmitter. To resynchronize your transmitter, stand close to your vehicle and press and hold the LOCK and UNLOCK buttons on the transmitter at the same time for seven seconds. The door locks should cycle to confirm synchronization. If the locks do not cycle, see your dealer for service. Tailgate 1. Insert a dime in the slot between the covers of the transmitter housing near the key ring hole. Remove the bottom by twisting the dime. 2. Remove and replace the battery with a three-volt CR2032 or equivalent battery, positive (+) side up. 3. Align the covers and snap them together. 4. Resynchronize the transmitter. 5. Check the operation of the transmitter. You can open the tailgate by lifting up on its handle while pulling the tailgate toward you. To shut the tailgate, firmly push it away from you into the latch. After you put the tailgate back up, pull it back toward you to be sure that it latches securely. 2-8