GM Service Manual Online
For 1990-2009 cars only

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B0024 Keyless Entry Transmitter Synchronization Failure

Conditions for Setting the DTC

DTC is a remote code key rolling error. Each time a message is received from the remote coded key via a transmission, the rolling code is checked. DTC B0024 will set if the rolling code is out of range.

To re-sync the rolling code, turn the ignition ON with the remote coded key.