"1991 Light Duty Truck R/V, & P Models 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. Find out what is covered by clicking here to see the table of contents.
It is a set of loose-leaf sheets. Because the sheets are oversize, they may be folded in half for shipment. This diagram covers 1991 GMC trucks, including Suburban, full-size Jimmy, half ton, three-quarter ton, one ton, R & V series pickup, stakebed, platform, and crew cab. This diagram covers the "old style" R/V pickups for 1991, they have wing windows. If your pickup does not have wing windows, see the C/K series pickup diagram. Includes 2 wheel drive, 4 wheel drive, and dually models. Covers both gasoline and diesel engines. This book has 202 pages, measures 17.25" x 11" and is 0.63" thick. Buy now for the best electrical information available.