Circuit/System Description
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.
Battery voltage is supplied to the system from the 47 fuse in the underhood fuse block. The system is grounded at the G300 chassis harness ground. The key fobs and exit/learn switch are inputs to the receiver module. The receiver module commands the master motor through the Wake Up, Open, and Close signal circuits and controls the cargo lamp through a low side drive control circuit. The master motor commands the slave motor through an X Bus communication circuit.