Programming the XBCM
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 GMC Sierra 3500 HD, 2013 GMC Sierra 2500 HD, 2013 GMC Sierra 1500, 2013 Chevrolet Silverado 3500 HD, and 2013 Chevrolet Silverado 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The vehicle theft system may not operate properly if a replacement XBCM is not properly programmed.
Program the auxiliary body control module. Refer to Service Programming System (SPS) for more information.