Original 1991 GMC Dealer Electrical Wiring Diagram Service Manual. This very informative Factory Manual covers Light Truck S/T Models. These detailed Wiring Diagrams are what the Dealership used to diagnose and repair your GMC. Very useful and rare since they were not offered to the public. X-9144
Not finding what you're looking for? With over 200,000 products, it's hard to list them all.
Click here to request the item you're looking for.