1999 GMC P3500 Service and Repair Manual

This factory service and repair manual for the 1999 GMC P3500 keeps five engines in scope: the turbocharged 6.5L V8 diesel, the naturally aspirated 6.5L V8 diesel, the 7.4L V8, the 4.3L V6 and the 5.7L V8. Body entries number three, chassis, stripped motorhome chassis and two-door cab and chassis, and trims two, Base and Base Stripped. The reference is built by system, so the procedures, specifications, torque values, wiring diagrams and diagnostics for a job are found in one place regardless of which body the frame is carrying.

Engines covered

• 6.5L V8 (395 cu in) — OHV, turbocharged, diesel
• 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
• 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline
• 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline
• 6.5L V8 (395 cu in) — OHV, naturally aspirated, diesel

Body styles covered

• Chassis
• Motorhome, stripped chassis
• 2-door cab & chassis

Trims covered

• Base
• Base Stripped

Known issues on the 1999 P3500. The manual is used the way any factory book is on an older commercial chassis: to get the correct procedure, the correct specification and the correct torque value for the engine in the truck, and to read the wiring diagrams and follow the diagnostics when a circuit somewhere between the cab and the body stops behaving.