Keyless Transmitter Low Battery Warning
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.
The Drivers Message Center will display a warning light if the Keyless Transmitter battery becomes low. Refer to Transmitter Battery Replacement for battery replacement procedures.