1990 Chevrolet G20 Service and Repair Manual

This factory service and repair manual for the 1990 Chevrolet G20 belongs to a van sold as a Beauville, a Chevy or a Sportvan, in an extended passenger body or in standard and extended cargo bodies. Four engines carry it: a 4.3L V6 of 262 cubic inches, a 5.0L V8 of 305, a 5.7L V8 of 350 and a 6.2L diesel V8 of 379, all overhead-valve and naturally aspirated. Procedures for fuel delivery, ignition and emissions differ sharply between the gasoline units and the diesel, and are given separately.

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 1990 G20. The federal record carries three recalls for this model year. One is a seat failure: the rear bench seat back can separate from its cushion in an accident. The remaining two concern replacement filters, one on the fuel side, where a poor seal can let gasoline escape and ignite, and one on the oil side, where lost sealing drains the engine and risks a fire. Seventeen complaints have been logged; engine and engine cooling and the service brakes lead with three each and the suspension follows with two. Cooling, brake hydraulic and suspension diagnostics are all covered.