2004 GMC W5500 Forward Service and Repair Manual
This factory service and repair manual for the 2004 GMC W5500 Forward covers two trim codes, W5S042 and W5T042, in two cab forms: the low tilt straight truck and the low crew cab straight truck. Under either cab sits one of two turbocharged diesels, the 4.8L inline-four of 290 cubic inches or the 7.8L inline-six of 475. The book keeps the two engines' specifications, torque values and diagnostic routines separate, which matters most when the same shop services both.
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
- W5S042
- W5T042
Known issues on the 2004 W5500 Forward. The 2004 W5500 Forward has a clean federal record: no recalls have been issued for it and no owner complaints have been logged with NHTSA. That leaves the manual to cover the model year on its own terms, with service procedures and published specifications for both turbocharged diesels, torque values for engine and chassis fasteners, and wiring diagrams that follow the circuits through the tilt cab and the crew cab.
