2007 GMC C8500 Topkick Service and Repair Manual
This factory service and repair manual for the 2007 GMC C8500 Topkick has four engines to document, and only one of them is a diesel. The gasoline side holds the naturally aspirated 4.8L and 8.1L OHV V8s, and there is a 5.3L OHV V8 built to run on flex fuel; the diesel is the turbocharged 7.8L inline-six. Bodies were the medium conventional straight truck and the four-door crew cab straight truck, in the C8C042, C8C064 and C8E042 designations.
Engines covered
- 5.3L V8 (325 cu in) — OHV, naturally aspirated, flex-fuel
- 4.8L V8 (294 cu in) — OHV, naturally aspirated, gasoline
- 7.8L inline-six (475 cu in) — turbocharged, diesel
- 8.1L V8 (496 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- Straight truck, medium conventional
- 4-door straight truck, crew cab
Trims covered
- C8C042
- C8C064
- C8E042
Known issues on the 2007 C8500 Topkick. NHTSA lists neither recalls nor owner complaints for this model year, so the federal record is clean. The manual's work is spread across four engines instead. The 4.8L and 8.1L gasoline V8s, the flex-fuel 5.3L V8 and the turbocharged 7.8L inline-six diesel each get their own procedures, specifications and torque values, while the wiring diagrams and diagnostics serve the medium conventional straight truck and the four-door crew cab body.
