Invalidate All

WARNING: This page is about a different car, the 2010 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

This procedure will erase all keyless entry transmitters from memory.

Install a scan tool.
Turn ON the ignition with the engine OFF.
With the scan tool, select Body.
Select Remote Control Door Lock Receiver (RCDLR).
Select Module Setup.
Select Program Key Fobs.
Select Invalidate All.
Follow the scan tool on screen instructions.