This is the original wiring diagram printed by GM for dealer mechanics. You can follow the wiring in your truck from bumper-to-bumper. It will help you to understand connector configurations, and locate & identify circuits, relays, and grounds. Although the schematic is in black and white, the color of each wire is noted. You will not find this diagram in your shop manual. The schematic measures 8.5" x 11" when folded up and opens up to 11" by 38". Buy now for the best electrical repair info - the factory wiring diagram.
general motors
"Cab, Engine and Chassis WIring - C/K-10, 20, 30" A-00208
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This book covers 1973 GMC/Chevrolet CK trucks, including half ton, three quarter ton, & 1 ton pickups as well as Suburban, 10, 20, 30, 1500, 2500, 2500 and Blazer/Jimmy. Includes 2 wheel drive and 4 wheel drive models. Covers both gasoline and diesel engines.
1973 Chevrolet Blazer
1973 Chevrolet C10 Pickup
1973 Chevrolet C10 Suburban
1973 Chevrolet C20 Pickup
1973 Chevrolet C20 Suburban
1973 Chevrolet C30 Pickup
1973 Chevrolet K10 Pickup
1973 Chevrolet K10 Suburban
1973 Chevrolet K20 Pickup
1973 Chevrolet K20 Suburban
1973 Chevrolet K30 Pickup
1973 GMC C15/C1500 Pickup
1973 GMC C15/C1500 Suburban
1973 GMC C25/C2500 Pickup
1973 GMC C25/C2500 Suburban
1973 GMC C35/C3500 Pickup
1973 GMC Jimmy
1973 GMC K15/K1500 Pickup
1973 GMC K15/K1500 Suburban
1973 GMC K25/K2500 Pickup
1973 GMC K25/K2500 Suburban
1973 GMC K35/K3500 Pickup
1973 Chevrolet Blazer 1973 Chevrolet C10 Pickup 1973 Chevrolet C10 Suburban 1973 Chevrolet C20 Pickup 1973 Chevrolet C20 Suburban 1973 Chevrolet C30 Pickup 1973 Chevrolet K10 Pickup 1973 Chevrolet K10 Suburban 1973 Chevrolet K20 Pickup 1973 Chevrolet K20 Suburban 1973 Chevrolet K30 Pickup 1973 GMC C15/C1500 Pickup 1973 GMC C15/C1500 Suburban 1973 GMC C25/C2500 Pickup 1973 GMC C25/C2500 Suburban 1973 GMC C35/C3500 Pickup 1973 GMC Jimmy 1973 GMC K15/K1500 Pickup 1973 GMC K15/K1500 Suburban 1973 GMC K25/K2500 Pickup 1973 GMC K25/K2500 Suburban 1973 GMC K35/K3500 Pickup