This factory service and repair manual for the 1990 GMC B6000 documents a cab forward school bus listed as B6P042 and the four engines available to it: the 6.0L OHV and 5.7L gasoline V8s and the 8.2L V8 diesel in turbocharged and naturally aspirated form. One chassis and four engines is a manageable spread, and it is handled by giving each engine its own specifications, torque values and diagnostic procedures before turning to the systems they all share.
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
Trims covered
- B6P042
Known issues on the 1990 B6000. Neither a recall nor an owner complaint is attached to this bus at NHTSA. The manual accordingly stays on the technical side. Procedures, specifications, torque values, wiring diagrams and diagnostics are supplied for the two gasoline V8s and the two 8.2L diesels, and the cab forward body and chassis sections cover the frame, driveline, brakes, steering and the wiring that ties the driver's controls to equipment at the rear of the bus.
