1986 Chevrolet C20 Suburban Service and Repair Manual

This factory service and repair manual for the 1986 Chevrolet C20 Suburban keeps four engines in scope, the 5.0L, 5.7L and 7.4L gasoline V8s and the 6.2L diesel, each overhead-valve and naturally aspirated, inside a single four-door sport utility body offered as Custom, Scottsdale or Silverado. Diagnosis on a vehicle like this begins with knowing which engine is in front of you, so fuel and ignition material is separated by engine before the manual runs its common driveline, brake, steering and body procedures.

Engines covered

• 5.0L V8 (305 cu in) — OHV, naturally aspirated, gasoline
• 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
• 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
• 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• Custom
• Scottsdale
• Silverado

Known issues on the 1986 C20 Suburban. What the manual holds is procedure: engine mechanical work and torque values for four different engines, fuel and ignition diagnosis kept separate for the gasoline V8s and the diesel, hydraulic brake service, steering and suspension specifications, axle and driveline overhaul, and wiring diagrams for the charging, lighting and instrument circuits of the four-door body.