2003 GMC W5500 Forward Service and Repair Manual
This factory service and repair manual for the 2003 GMC W5500 Forward is a two-engine, two-cab book. The engines are turbocharged diesels: a 4.8L inline-four of 290 cubic inches and a 7.8L inline-six of 475 cubic inches. The cabs are the low tilt and the low crew cab, both on the straight truck chassis, and three trim codes are listed, W5R042, W5S042 and W5T042. Procedures, specifications and torque values are given per configuration so nothing has to be inferred from the other build.
Engines covered
- 4.8L inline-four (290 cu in) — turbocharged, diesel
- 7.8L inline-six (475 cu in) — turbocharged, diesel
Body styles covered
- Straight truck, low tilt
- Straight truck, low crew cab
Trims covered
- W5R042
- W5S042
- W5T042
Known issues on the 2003 W5500 Forward. Nothing appears against the 2003 W5500 Forward on the federal record, with no recalls and no owner complaints logged with NHTSA. In place of a known fault to work around, the manual offers coverage across the range: engine diagnostics and specifications for both the turbocharged inline-four and the turbocharged inline-six, torque values for the assemblies each one drives, and wiring diagrams for the tilt and crew cab bodies.
