1984 GMC Astro Service and Repair Manual
This factory service and repair manual for the 1984 GMC Astro names three diesels — the turbocharged 14.0L inline-six, the 9.0L V6 and the 12.1L V8 — and carries a fourth engine entry recorded without details. The truck was cataloged in five designations, among them a high tilt glider, and built as either a high tilt tractor or a high tilt straight truck. Engine specifications, torque values and diagnostics are kept separate by engine, while cab and chassis material serves both body configurations.
Engines covered
- 14.0L inline-six (855 cu in) — turbocharged, diesel
- 9.0L V6 (552 cu in) — diesel
- 12.1L V8 (736 cu in) — diesel
Body styles covered
- Tractor truck, high tilt
- Straight truck, high tilt
Trims covered
- D9K042
- D9K064
- D9L020 Gliders - High Tilt
- D9L042
- D9L064
Known issues on the 1984 Astro. A clean federal record stands behind this truck, with no recall against it and no owner complaint at NHTSA. The manual therefore stands on its coverage of the engines and the chassis. It gives procedures, specifications, torque values, wiring diagrams and diagnostics for the turbocharged 14.0L inline-six, the 9.0L V6 diesel and the 12.1L V8 diesel, and it documents the tilt cab, frame, driveline and electrical system that the tractor and straight truck versions have in common.
