Transmitter Battery Replacement: Notes
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Under normal use, the battery in the remote control door lock transmitter will last about 2 years.
The battery is weak if the transmitter does not work at the normal range in any location. If you have to get close to the vehicle before the transmitter works, change the battery.