2005 GMC C5500 Topkick Service and Repair Manual
This factory service and repair manual for the 2005 GMC C5500 Topkick covers a year in which the chassis appeared under six trim codes and in four body configurations, from the 2-door conventional cab and chassis to the crew cab and chassis, the motorhome cutaway and the cab and chassis cutaway. Power came from either a turbocharged 6.6L overhead-valve V8 diesel of 403 cubic inches or a naturally aspirated 8.1L overhead-valve V8 gasoline engine of 496 cubic inches. Each system is documented separately, with procedures, specifications, torque values, wiring diagrams and diagnostics for both engines.
Engines covered
- 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
- 8.1L V8 (496 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 2-door cab & chassis, conventional
- Cab & chassis, crew cab
- Motorhome, cutaway
- Cab & chassis, cutaway
Trims covered
- C5C042
- C5C044
- C5E042
- C5E044
- C5U042
- C5V042
Known issues on the 2005 C5500 Topkick. Two recalls sit on the federal record for the 2005 C5500 Topkick, and both trace to equipment fitted to the chassis rather than to the chassis itself. In one, a protection diode in an aftermarket wheelchair-lift interlock could be overwhelmed by voltage spikes and fail, allowing the truck to be driven with the lift deployed. In the other, the lateral control bracket on an aftermarket rear air suspension cracked, which could upset handling badly enough to lose control. Three owner complaints are recorded, two on engine and engine cooling and one on steering — systems this manual covers with its own procedures, torque values and diagnostics.
