Circuit/System Verification
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Verify none of the following DTCs are set: DTC B 3109, B 3110, B 3111 and B 3112.
If any of the DTCs are set, replace the battery in the applicable keyless entry transmitter. Operate the applicable transmitter 3 consecutive times. If any of the DTCs reset, replace the applicable keyless entry transmitter.