1988 Chevy S10 Blazer/Truck and GMC S15 Jimmy/Pickup Electrical Wiring Diagrams General Motors Corporation. Find out how to access AutoZone's Wiring Diagrams Repair Guide for Chevy S10, S15, and GMC Sonoma Pick-Ups 1982-1993 Repair Manual. AutoZone's Repair Guides tell you what you need to know to do the job right.
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Just to add, there should be a fuel pump test connector, under the hood. driverside fender lining. Tan wire with white tracer, electrical connector, nothing plugged into it. If you use a jumper wire with inline fuse to battery +, the pump should run, no need to use the key. In the diagram c8 is the test connector, #3 is the fuel pump relay.. Does the GMC S-15 manual include wiring diagrams? Yes, the GMC S-15 1982-1993 workshop manual includes comprehensive wiring diagrams covering the complete electrical system including engine management, body control modules, lighting, sensors, infotainment systems, and all electronic components with connector pinouts and wire color codes.