1986 GMC Brigadier Service and Repair Manual
This factory service and repair manual for the 1986 GMC Brigadier lists five diesels: the turbocharged 10.0L and 14.0L inline-sixes, the 9.0L V6, the 7.0L inline-six and the 10.4L V8. The truck was cataloged as a short conventional tractor and a short conventional straight truck under five designations, one a glider. Each engine has its own specifications, torque values and diagnostic routines, kept apart from the chassis material.
Engines covered
- 10.0L inline-six (611 cu in) — turbocharged, diesel
- 14.0L inline-six (855 cu in) — turbocharged, diesel
- 9.0L V6 (552 cu in) — diesel
- 7.0L inline-six (426 cu in) — diesel
- 10.4L V8 (636 cu in) — diesel
Body styles covered
- Tractor truck, short conventional
- Straight truck, short conventional
Trims covered
- J8C042
- J8C064
- J9C020 Gliders - Short Conventional
- J9C042
- J9C064
Known issues on the 1986 Brigadier. There has been no recall on this truck and no owner complaint to NHTSA. The manual gets on with the technical work instead. The five diesels are documented with procedures, specifications, torque values, wiring diagrams and diagnostics, and the short conventional cab, frame, driveline, brakes and electrical system are covered in the same book, so tractor and straight truck builds are both served without a second reference.
THE THROTTLE RETURN SPRING ASSEMBLY MAY FAIL AND PREVENT THE THROTTLE FROM RETURNING TO THE CLOSED (IDLE) POSITION WHEN THE ACCELERATOR PEDAL IS RELEASED.
REPLACE ACCELERATOR LINKAGE RETURN SPRING(S).
