1986 GMC B6000 Service and Repair Manual
This factory service and repair manual for the 1986 GMC B6000 records two body variants, the cab forward school bus and a cab forward non school bus, both under the B6P042 designation, and serves them with five engines: the 6.0L OHV and 5.7L gasoline V8s, the turbocharged 14.0L inline-six diesel, and the turbocharged and naturally aspirated 8.2L V8 diesels. Procedures, specifications and torque values are given per engine, while the chassis material applies to both bodies.
Engines covered
- 6.0L V8 (366 cu in) — OHV, 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
- Bus (non school), cab forward
Trims covered
- B6P042
Known issues on the 1986 B6000. Federally this bus is unblemished, with no recall action and no owner complaints at NHTSA. The manual's contribution is technical rather than corrective. It documents each of the five engines with procedures, specifications, torque values, wiring diagrams and diagnostics, and it covers the cab forward chassis in the same way, from the frame and driveline through the brake and steering systems to the wiring that connects the front controls to the rear of the body.
