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". The diagram pictured is an example of this type when folded, but is not the actual diagram for your vehicle. Buy now for the best electrical repair info - the factory wiring diagram.
"Cab, Engine and Chassis Wiring - G-10, 20, 30"
This item is original.
11.00 x 8.50 x 0.10 inches
Covers 1974 Chevy & GMC G Van models including half ton, three quarter, one ton, G10, G20, G30, G1500, G2500, G3500, Beauville, Sportvan, Chevy Van, Rally Van, Vandura, Hi-Cube, Extended, and van chassis. Covers C class motorhome chassis with a van front end on it. It will cover the part of the motorhome manufactured by GM and will not cover motorhome bodies. Comes with the Miscellaneous R.P.O. Equipment sheet.
1974 Chevrolet G10 Van
1974 Chevrolet G10 Van Sportvan
1974 Chevrolet G20 Van
1974 Chevrolet G20 Van Sportvan
1974 Chevrolet G30 Van
1974 Chevrolet G30 Van Sportvan
1974 GMC G15/G1500 Van Rally
1974 GMC G15/G1500 Van Vandura
1974 GMC G25/G2500 Van Rally
1974 GMC G25/G2500 Van Vandura
1974 GMC G35/G3500 Van
1974 GMC G35/G3500 Van Rally
1974 GMC G35/G3500 Van Vandura
1974 GMC Motorhome Chassis
1974 Chevrolet G10 Van 1974 Chevrolet G20 Van 1974 Chevrolet G30 Van 1974 GMC G15/G1500 Van 1974 GMC G25/G2500 Van 1974 GMC G35/G3500 Van 1974 GMC Motorhome Chassis