This factory service and repair manual for the 1989 Chevrolet B60 lists the cab forward school bus as B6P042 and gives it four engines: the naturally aspirated 6.0L OHV gasoline V8, the naturally aspirated 5.7L gasoline V8, and the 8.2L V8 diesel in turbocharged and naturally aspirated form. Each is documented separately, because a diesel's injection, air and starting systems have almost nothing in common with a gasoline V8's ignition and fuel systems, and only the chassis beneath them is genuinely shared.
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 B60. Nothing appears on the federal record for this year, no recall and no owner complaint. The manual's worth is in what it explains. Diagnostic charts start from a symptom and work toward a cause across all four engines; repair procedures give the sequence and the torque values; specifications cover clearances, pressures and settings; and wiring diagrams show the bus's circuits as built, which is the only reliable way to trace an electrical fault on a chassis of this age.
