1991 Chevrolet G30 Service and Repair Manual

This factory service and repair manual for the 1991 Chevrolet G30 sets four naturally aspirated overhead-valve engines against six bodies and four trims. The engines are a 4.3L V6 of 262 cubic inches, a 5.7L V8 of 350, a 7.4L V8 of 454 and a 6.2L diesel V8 of 379; the bodies are passenger and cargo vans in standard and extended length plus two cutaway forms; the trims are Beauville, Chevy, Hi-Cube and Sportvan. Each combination is given its own specifications rather than a generic figure.

Engines covered

• 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
• 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

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

Trims covered

• Beauville
• Chevy
• Hi-Cube
• Sportvan

Known issues on the 1991 G30. The manual is a complete reference: engine mechanical, lubrication and cooling procedures for three gasoline engines and one diesel; fuel, ignition and emissions diagnostics; transmission, driveshaft and axle service; brake hydraulic, steering and suspension specifications with the torque values that go with them; and wiring diagrams drawn body by body so a circuit can be traced end to end.