Programming the XBCM
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The vehicle trailer lamps, theft and rear fog lamps 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.