1990 GMC Medium Truck C5D, C6D, C7D, B6P, S7T, P4T, P6T Models Factory Wiring Diagrams

Used factory manual in good condition.

This factory manual provides diagrams, illustrations and specifications to help diagnose electrical system problems.

Table of Contents:

• Description
  • Tracing Circuits
  • Basic Electric Circuits
  • Circuit Diagnosis
• Diagnostic Tools
  • Wire Size Conversion Table
• On-Vehicle Service
  • Circuit Maintenance and Repair
  • Weather Pack Connectors
  • Metri-Pack Connectors
  • Wiring Repair
• Abbreviation List
• Special Tools

Covers the following Vehicles:

• Forward Control Chassis
  • P4T w/In-Line 6 Gasoline Engine
  • P6T w/Gasoline Engine, Diesel Engine
  • P6T-Motorhome
• Medium Duty Conventional Cab Models
  • C5, C6, C7 w/Gasoline Engine, Diesel Engine
• Bus Chassis Model
  • B6P042 w/Gasoline Engine, Diesel Engine
  • S7T042 w/Gasoline Engine