"1993 Topkick & Kodiak, B7 School Bus, and Medium Duty Forward Control Chassis Electrical Diagrams and Diagnosis Manual" Written for GMC dealership mechanics, this factory-published original wiring diagram shows you how to follow the wiring from bumper-to-bumper. It will help you understand connector configurations, and locate and identify circuits, relays, and grounds. You will not find these wiring diagrams in the factory shop manual. Wiring diagrams are black and white, but they frequently have color codes printed on each line of the diagram that represents a wire. This manual covers all 1993 Medium Duty Truck models including Topkick, Kodiak, Forward Control Chassis, and B7 School Bus. This book measures 17.25" x 11" and is 1" thick Buy now for the best electrical information available.
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