This factory service and repair manual for the 1999 Chevrolet T6500 drops the gasoline option and leaves two turbocharged diesel inline-sixes in the F6B042 straight truck with its low tilt cab: a 7.2L overhead-valve engine of 441 cubic inches and a larger 7.8L of 475 cubic inches. Both are compression ignition, so the fuel injection, air induction, cooling and lubrication material dominates the engine chapters, and the specifications and torque values are given separately for each of the two displacements.
Engines covered
- 7.2L inline-six (441 cu in) — OHV, turbocharged, diesel
- 7.8L inline-six (475 cu in) — turbocharged, diesel
Body styles covered
- Straight truck, low tilt
Trims covered
- F6B042
Known issues on the 1999 T6500. This model year carries a clean federal record: no recalls and no owner complaints. The manual is therefore a working reference rather than a defect guide, and it reads like one, taking each system in turn with the numbers attached. Engine mechanical procedures come with their clearances, the diesel fuel and induction sections with their diagnostic routines, the chassis and cab work with the torque value for every fastener involved, and the electrical material with wiring diagrams that show each circuit end to end.
