1987 GMC General Service and Repair Manual
This factory service and repair manual for the 1987 GMC General documents seven diesels in a single volume: the 7.0L inline-six of 426 cubic inches, the 9.0L V6 of 552, the 12.1L V8 of 736, the turbocharged 10.0L, 14.0L and 14.6L inline-sixes, and the turbocharged, aftercooled 12.7L inline-six of 774. Straight-truck and tractor bodies in medium conventional, long conventional and low tilt form are covered across six build codes, each system carrying its own procedures, specifications, torque values, wiring diagrams and diagnostics.
Engines covered
- 14.6L inline-six (893 cu in) — turbocharged, diesel
- 14.0L inline-six (855 cu in) — turbocharged, diesel
- 9.0L V6 (552 cu in) — diesel
- 12.7L inline-six (774 cu in) — turbocharged, aftercooled, diesel
- 12.1L V8 (736 cu in) — diesel
- 10.0L inline-six (611 cu in) — turbocharged, diesel
- 7.0L inline-six (426 cu in) — diesel
Body styles covered
- Straight truck, long conventional
- Straight truck, medium conventional
- Tractor truck, low tilt
- Tractor truck, medium conventional
- Tractor truck, long conventional
Trims covered
- N9E020 Gliders - Medium Conventional
- N9E042
- N9E064
- N9F020 Gliders - Long Conventional
- N9F042
- N9F064
Known issues on the 1987 General. No recalls stand against the 1987 General on the federal record and no owner complaints are logged at NHTSA, leaving the year clean. The manual's usefulness lies in the breadth of the engine coverage, since the specifications, service procedures and torque values have to run from a 7.0L inline-six through to a turbocharged, aftercooled 12.7L. Wiring diagrams and system diagnostics for the cab and chassis circuits complete a book meant for a mixed fleet rather than a single spec.
