With GMLAN Amplifier (UQA W/Y91)
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
After replacing the amplifier, perform the programing procedure. Refer to Service Programming System (SPS) .