2004 GMC C4500 Topkick Service and Repair Manual
This factory service and repair manual for the 2004 GMC C4500 Topkick is written for a chassis that rarely stays in the shape it left the plant: cab and chassis in crew cab and conventional two-door form, plus cutaway and motorhome cutaway versions, listed under the codes C4C042, C4E042, C4U042 and C4V042. Power comes from the turbocharged 6.6L diesel V8 or the naturally aspirated 8.1L gasoline V8. The manual documents the chassis as delivered, system by system, with specifications, torque values, wiring diagrams and diagnostics.
Engines covered
- 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
- 8.1L V8 (496 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- Cab & chassis, crew cab
- Motorhome, cutaway
- Cab & chassis, cutaway
- 2-door cab & chassis, conventional
Trims covered
- C4C042
- C4E042
- C4U042
- C4V042
Known issues on the 2004 C4500 Topkick. One owner complaint is on NHTSA's record for this model year, and it concerns the service brakes. On a medium-duty truck carrying whatever body was built onto it, brake condition is the first thing worth checking and the hardest to guess at, which makes the brake chapter the most used part of this book. It covers the hydraulic system, friction hardware, the parking brake, adjustment and bleeding procedures, wear specifications, fastener torque values and the diagnostic steps for tracing a pull or a low pedal.
