1986 Chevrolet G20 Service and Repair Manual

This factory service and repair manual for the 1986 Chevrolet G20 has four engines to specify, the 4.3L V6 of 262 cubic inches, the 5.0L V8 of 305, the 5.7L V8 of 350 and the 6.2L diesel V8 of 379, all overhead-valve and none turbocharged, against three bodies and three trims. The bodies are the extended passenger van and the standard and extended cargo vans; the trims are Beauville, Chevy and Sportvan. The engine chapters branch four ways while the body electrical material largely does not.

Engines covered

• 5.0L V8 (305 cu in) — OHV, naturally aspirated, gasoline
• 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
• 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline
• 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 3-door extended passenger van
• 3-door van standard cargo van
• 3-door van extended cargo van

Trims covered

• Beauville
• Chevy
• Sportvan

Known issues on the 1986 G20. A single recall is recorded federally for this model year: replacement oil filters that seal inadequately, letting the engine lose oil with a fire possible if it reaches something hot. The complaint record holds five reports, with the power train, the seats and the service brakes each drawing one and the rest scattered. None of that points at one weak system, so the useful material here is the ordinary kind, brake hydraulic specifications, transmission and axle procedures, seat and interior fastener torque values, and the diagnostics that belong with them.