1983 GMC S15 Service and Repair Manual

This factory service and repair manual for the 1983 GMC S15 lists an extended cab pickup alongside the standard cab and the cab and chassis, and a Gypsy trim beside Base, High Sierra and Sierra Classic. Three gasoline engines are covered: a 2.8L overhead-valve V6 at 173 cubic inches, a 2.0L overhead-valve inline-four at 122 cubic inches, and a 1.9L single-overhead-cam inline-four at 119 cubic inches. Each of them is given its own procedures, specifications, torque values, wiring diagrams and diagnostics.

Engines covered

• 2.8L V6 (173 cu in) — OHV, naturally aspirated, gasoline
• 2.0L inline-four (122 cu in) — OHV, naturally aspirated, gasoline
• 1.9L inline-four (119 cu in) — SOHC, naturally aspirated, gasoline

Body styles covered

• 2-door extended cab pickup
• 2-door cab & chassis
• 2-door standard cab pickup

Trims covered

• Base
• Gypsy
• High Sierra
• Sierra Classic

Known issues on the 1983 S15. Read as a shop reference, the manual's most-used material is the engine section, where three units with different valvetrains each need their own timing, clearance and torque figures, followed by the driveline, brake and front suspension procedures. Specifications and diagnostic routines run alongside, and the wiring diagrams cover both pickup bodies and the cab and chassis.