Electrical Manual for GM's full-size pickup and SUV lineup (Chevrolet Silverado, Tahoe, Suburban, and GMC Sierra, Yukon) from 2007 onward, written in English. The document provides an in-depth description of the Body Control System (BCM), GMLAN data communications, Electrical Power Management (EPM), and the Power Take-Off (PTO) system. It also includes wiring diagrams, component locations, fuse blocks, and connectors for various systems such as trailering, lighting, and braking.