2000 GMC W4500 Forward Service and Repair Manual
This factory service and repair manual for the 2000 GMC W4500 Forward has one body to describe, the low-tilt straight truck, and one build code, W4S042, but two fuels. The diesel is a turbocharged 4.8L inline-four of 290 cubic inches; the gasoline engine is a naturally aspirated 5.7L overhead-valve V8 of 350 cubic inches. That split is answered by keeping engine mechanical, fuel and management chapters separate while the cab, frame, brakes, steering and driveline share a common set of procedures, specifications, torque values, wiring diagrams and diagnostics.
Engines covered
- 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline
- 4.8L inline-four (290 cu in) — turbocharged, diesel
Body styles covered
- Straight truck, low tilt
Trims covered
- W4S042
Known issues on the 2000 W4500 Forward. The single owner complaint at NHTSA for this model year falls under the engine and cooling system. In a cabover the cooling package works hard, sits in tight space and is reached through the tilted cab, so the manual's coverage there matters: radiator, fan, thermostat and water-pump procedures, coolant capacities and pressure-test specifications, hose and clamp torque values, and diagnostics for overheating and temperature-gauge faults on both the 4.8L diesel and the 5.7L gasoline V8.
