Home >> GMC >> 2001 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Wiring Systems - Wiring Schematics And Wiring Harness Routing Diagrams >> Wiring Schematics and Wiring Harness Routing Diagrams >> Power Distribution Wiring Schematics >> O2B, O2A, ENG 1, and IGN E Fuses- Gas