Original Factory Soft Cover Manuals from GMC in Good Condition: This manual is a supplement to the 1974 Truck Wiring Diagram Manual- X7430 and contains wiring diagrams for truck models listed below.

Truck Series Covered:

• C-10,20,30; C-15,25,35
• K-10,20,30; K-15,25,35
• P-10,20,30; P-15,25,35
• G-10,20,30; G-15,25,35
• C-80, D-80