1991 GMC B6000 Service and Repair Manual
This factory service and repair manual for the 1991 GMC B6000 covers both bodies recorded that year, a cab forward school bus and a cab forward non school bus, each as B6P042, with four engines: two gasoline V8s of 6.0L and 5.7L, and the 8.2L V8 diesel in turbocharged and naturally aspirated form. Engine material is kept separate for each, while the chassis, brake, steering and electrical sections serve both body types without duplication.
Engines covered
- 6.0L V8 (366 cu in) — OHV, naturally aspirated, gasoline
- 5.7L V8 (350 cu in) — naturally aspirated, gasoline
- 8.2L V8 (501 cu in) — turbocharged, diesel
- 8.2L V8 (501 cu in) — naturally aspirated, diesel
Body styles covered
- Bus (school), cab forward
- Bus (non school), cab forward
Trims covered
- B6P042
Known issues on the 1991 B6000. There is no recall on this bus and no owner complaint behind it at NHTSA. The manual's usefulness is in what it documents. Each of the four engines is documented in procedure and specification, down to torque values, wiring diagrams and diagnostics, and the cab forward chassis gets the same coverage across both the school and non school builds, from foundation brake work and steering geometry to tracing a circuit through the body wiring from front to rear.
