1985 Chevrolet P20 Service and Repair Manual

This factory service and repair manual for the 1985 Chevrolet P20 documents a two-door van and a chassis, both offered as Base Stripped and Step-Van Delivery, and both able to take any of three naturally aspirated, overhead-valve engines: a 6.2L V8 of 379 cubic inches on diesel, a 4.8L inline-six of 292 cubic inches or a 5.7L V8 of 350 cubic inches on gasoline. The diesel brings injection and compression specifications of its own; the gasoline pair bring ignition work the diesel has no use for. The chassis sections apply to all of them.

Engines covered

• 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
• 4.8L inline-six (292 cu in) — OHV, naturally aspirated, gasoline
• 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 2-door van
• Chassis

Trims covered

• Base Stripped
• Step-Van Delivery

Known issues on the 1985 P20. What matters on a vehicle of this kind is what happens between services, and that is what the manual specifies: valve train and short block procedures for all three engines, injection and ignition system work, cooling and lubrication specifications, driveline and axle overhaul, brake and suspension torque values, and chassis wiring diagrams with the diagnostic steps for using them.