This factory service and repair manual for the 1989 GMC B6000 is written for the cab forward school bus in B6P042 form, with four engines to cover: the 6.0L OHV gasoline V8, the 5.7L gasoline V8, the turbocharged 8.2L V8 diesel and the naturally aspirated 8.2L V8 diesel. The specifications, torque values and diagnostic routines are set out engine by engine, and the chassis, brake, steering and electrical material applies to the bus whichever of the four sits in the front cowl.
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 1989 B6000. This bus has no recalls on the federal record and no owner complaints logged with NHTSA. The manual's coverage is the reason to have it. Both gasoline V8s and both 8.2L diesels come with procedures, specifications, torque values, wiring diagrams and diagnostics, and the cab forward chassis is documented to the same standard, so brake work, steering repairs and electrical faults can all be traced and corrected from a single reference.
