1988 Chevrolet/GMC Light Duty Truck Wiring Manual

Year
1988
Make
Chevrolet, GMC
Vehicle
C/K Trucks, G Vans, Light Duty Trucks, M Vans (Astro/Safari), P Forward Control, R/V Trucks, S/T Trucks, Trucks
Type
Wiring Diagrams
Models
C/K, G, S/T, R/V, P, M
Publication
ST-350-88
Pages
454

The 1988 Light Duty Truck Wiring Diagram Booklet, ST-350-88, covering Chevrolet and GMC light trucks. It opens with a general section on reading the diagrams: wire coding, tracing circuits, basic electric circuits, circuit diagnosis, abbreviations, diagnostic tools, a wire size conversion table, circuit maintenance and repair, Weather-Pack and Metri-Pack connectors, wiring repair and special tools. Six vehicle sections follow, each with its own index and page numbers: C/K models (A), G van (B), S/T models (C), R/V models (D), P chassis (E) and M van (F). Each section runs from power distribution and fuse block details through lamps, starting, ignition, engine controls and ECM charts to accessories and rear lighting.

Pages 1–10 (10 pages)

Description, Diagnosis and Wiring Repair

How to read and use the diagrams. It explains the wire code (circuit number, size in square millimeters and insulation color), tracing a circuit from the battery through the power distribution and starter examples, series and parallel circuits and fusible links, and circuit diagnosis. It also gives the abbreviation list, diagnostic tools, a wire size conversion table, circuit maintenance and repair, Weather-Pack and Metri-Pack connector service, wiring and twisted-wire repair, and special tools.

What this section covers

  • Wire coding and colors
  • Tracing circuits
  • Basic electric circuits and fusible links
  • Circuit diagnosis and diagnostic tools
  • Wire size conversion table
  • Weather-Pack and Metri-Pack connectors
  • Wiring and twisted-wire repair
  • Special tools
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