1989 GMC C/K Truck Wiring Diagrams

This manual covers the "new style" C/K trucks. These trucks DO NOT have wind wing windows. If your truck has the wind wing windows, see the R/V series truck manual

Sierra Pickups - C1500 C2500 C3500 K1500 K2500 K3500 | 1/2 Ton, 3/4 Ton and 1 Ton | All Trims Including SL, SLE & SLX | 4.3L V6 Gas, 5.0L V8 Gas, 5.7L V8 Gas, 7.4L Gas & 6.2L V8 Diesel Engines

Published by the General Motors Corporation

Electrical Diagnosis & Power Distribution * Harness Routing Views * Circuit Operation * Circuit Diagrams * Connectors * Component Locator Views * Wiring Diagrams

This factory manual is written by GM specifically for the vehicle(s) listed. This ensures you get the job done right the first time. It is very detailed with good diagrams and exploded views. A must for anyone who insists on Genuine OEM quality parts.
Large format 11" x 17". Approx. 139 pages.

Condition

Good usable condition. Covers show some wear and soiling. All pages are in place and straight. Page surfaces are mostly clean.

Topics Include

• Harness Routing Views
• Basic Electricity
• Electrical Diagnosis
• Circuit Diagrams
• Circuit Wiring
• Connector Diagnosis Procedures
• Connectors
• Component Locater Views
• Component Locater Index