1988 GMC Brigadier Service and Repair Manual
This factory service and repair manual for the 1988 GMC Brigadier names seven diesel engines, including the turbocharged, aftercooled 11.1L inline-six and the 8.2L V8 alongside 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 built as a short conventional tractor or straight truck and as a low tilt tractor, under five designations.
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
- 11.1L inline-six (677 cu in) — turbocharged, aftercooled, diesel
- 7.0L inline-six (426 cu in) — diesel
- 8.2L V8 (501 cu in) — diesel
- 10.4L V8 (636 cu in) — diesel
Body styles covered
- Tractor truck, short conventional
- Straight truck, short conventional
- Tractor truck, low tilt
Trims covered
- J8C042
- J8C064
- J9C020 Gliders - Short Conventional
- J9C042
- J9C064
Known issues on the 1988 Brigadier. The federal record adds nothing here: no recall, and no owner complaints at NHTSA. The manual therefore does what it was written for. It gives procedures, specifications, torque values, wiring diagrams and diagnostics for each of those diesels, from the 7.0L inline-six to the turbocharged, aftercooled 11.1L, and covers the short conventional and low tilt chassis in the same detail, including the frame, driveline, air system, brakes and truck wiring.
THE REAR AXLE RELAY VALVES (ONE PER AXLE) MAY NOT MEET BRAKE RELEASE TIMING REQUIREMENTS OF FMVSS 121.
THE REAR AXLE BRAKES MAY NOT RELEASE IN THE TIMESSPECIFIED BY FMVSS 121.
REPLACE THE NONCOMPLYING RELAY VALVES.
