Written for General Motors 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. It is a set of loose-leaf sheets. This diagram covers 1987 Chevy and GMC trucks, including half ton, three-quarter ton, one ton, 10, 20, 30, 1500, 2500, 3500, pickup, Suburban, full-size K5 Blazer, full-size K5 Jimmy, stakebed, platform, and crew cab. Includes 2 wheel drive, 4 wheel drive, and dually models. Covers both gasoline and diesel engines. This set has 52 pages, measures 17" x 11" and is 0.19" thick. Because the sheets are oversized, they may be folded in half for shipment. Buy now for the best electrical information available.
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