1989 GMC P2500 Service and Repair Manual

This factory service and repair manual for the 1989 GMC P2500 spans three engines and two body configurations. On the gasoline side are the 4.8L inline-six and the 5.7L V8; on the diesel side, the 6.2L V8; all three are overhead-valve and naturally aspirated. The van and the chassis were both listed in Base Stripped and Value form. Rather than being split by model, the book is split by system, so a given repair is looked up once and its procedures, specifications, torque values, wiring diagrams and diagnostics follow from there.

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 delivery van
• Chassis

Trims covered

• Base Stripped
• Value

Known issues on the 1989 P2500. Neither a recall nor an owner complaint appears on the federal record for the 1989 P2500. Without a defect history to work around, what matters is coverage depth: procedures and specifications for the 4.8L inline-six, the 5.7L V8 and the 6.2L diesel, torque values for the assemblies those procedures open, and wiring diagrams paired with diagnostic sequences for the electrical side of both the delivery van and the bare chassis.