1978 Chevy and GMC Truck Models 10-35 Electrical Wiring Diagrams

1/2, 3/4 & 1 Ton | Chevrolet C10 Pickup, C10 Suburban, C20 Pickup, C20 Suburban, C30 Pickup, K5 Blazer, K10 Pickup, K10 Suburban, K20 Pickup, K20 Suburban, K30 Pickup (Custom, Big Ten, Cheyenne, Scottsdale, Silverado) / GMC C15 Pickup, C15 Suburban, C25 Pickup, C25 Suburban, C35 Pickup, Jimmy, K15 Pickup, K15 Suburban, K25 Pickup, K25 Suburban, K35 Pickup (Sierra, High Sierra, Sierra Grande)

5 pages that fold out to 11" x 38" each | Published by the General Motors Corporation

Circuit Diagrams * Locations * Power Distribution * Ground Distribution * Wiring Diagrams