Pages 4–10 (7 pages)

Heavy-Duty Cab, Engine and Chassis Diagrams (First Group)

From the 1968 GMC Truck Wiring Diagram Manual

Year
1968
Make
GMC
Vehicle
C/K Trucks, G Vans, Heavy Duty Trucks, Light Duty Trucks, Medium Duty Trucks, P Forward Control, Trucks
Type
Wiring Diagrams
Models
C, K, G, P 1500–3500; Series 4000–9500 gas and diesel
Publication
X-6805
Pages
45

Seven large fold-out schematics of complete cab, engine and chassis wiring, each with a circuit identification legend and a ground table (cab, engine, transmission, frame) and battery variants such as dual 6-volt and dual 12-volt frame-mounted batteries. In the index these are the lowest MD numbers (MD-2840 through MD-3243), used for the 4000, 4500–6500 and 7500 series and the 9500 diesels.

What this section covers

  • Cab, engine and chassis wiring on one sheet
  • Ground connections for cab, engine, transmission and frame
  • Dual 6-volt and dual 12-volt frame-mounted batteries
  • Starter, voltmeter and ammeter circuits
  • Circuit identification legend
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