This factory service and repair manual for the 1985 GMC B6000 stretches to six engines: the 6.0L OHV, 7.0L and 5.7L gasoline V8s, the turbocharged 14.0L inline-six diesel, and the 8.2L V8 diesel in turbocharged and naturally aspirated form. The bus is the cab forward school type in B6P042 form. Six engines under one body means six sets of specifications, torque values and diagnostic charts, and they are kept clearly separated from one another.
Engines covered
- 6.0L V8 (366 cu in) — OHV, naturally aspirated, gasoline
- 7.0L V8 (427 cu in) — naturally aspirated, gasoline
- 5.7L V8 (350 cu in) — naturally aspirated, gasoline
- 14.0L inline-six (855 cu in) — turbocharged, diesel
- 8.2L V8 (501 cu in) — turbocharged, diesel
- 8.2L V8 (501 cu in) — naturally aspirated, diesel
Body styles covered
- Bus (school), cab forward
Trims covered
- B6P042
Known issues on the 1985 B6000. Federal records show neither a recall nor an owner complaint against this bus. The manual is therefore judged on its coverage, and there is plenty of it. Every engine on the list, from the 5.7L gasoline V8 to the turbocharged 14.0L inline-six diesel, is worked through in procedure and specification, with torque values, wiring diagrams and diagnostics to match, while the cab forward chassis material covers brakes, steering, driveline and the electrical system that runs the length of the body.
