1991 Chevrolet G20 Service and Repair Manual

This factory service and repair manual for the 1991 Chevrolet G20 sets out three bodies, three trims and four engines. The bodies are the extended passenger van and cargo vans in standard and extended length; the trims Beauville, Chevy and Sportvan; the engines 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 naturally aspirated with overhead valves. Wiring diagrams, torque values and diagnostic charts are given for the systems those combinations produce.

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 1991 G20. Four recalls are on this year's federal record. Two of them bear on how well an occupant is held: safety belt anchorage bolts installed incorrectly, which can leave the belts unable to restrain someone in a crash, and a rear bench seat back that can tear away from its cushion in an accident. The other two are replacement filters, a fuel filter that can leak at a poorly sealed connection and an oil filter that can drain the engine, either one capable of feeding a fire. Five complaints are recorded, two on the structure. Restraint and body fastener torque values are specified here.