Pages 18–24 (7 pages)

Heavy-Duty Cab, Engine and Chassis Diagrams (Third 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 cab, engine and chassis schematics with legends, ground tables (cab, engine, transmission, frame) and battery options, including single 12-volt and 4-battery frame-mounted arrangements and the diesel cable ground. In index order these are the highest MD numbers, MD-3747 through MD-3800, covering HM/JM and HG/JG-7500, HM/JM-8500, 9500 diesels and the EM/ES/EG-5500 and 6500 series.

What this section covers

  • Cab, engine and chassis wiring
  • Ground cables for all models and diesel models
  • Single 12-volt and multiple-battery frame mounting
  • Voltmeter, starter and starter interlock circuits
  • Generator and gauge options
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