1988 GMC Astro Service and Repair Manual
This factory service and repair manual for the 1988 GMC Astro covers a truck cataloged four ways under five designations — tractor or straight truck, high tilt or low tilt. The engine list holds four entries, three of them named: the turbocharged 14.0L inline-six diesel, the 9.0L V6 diesel and the 12.1L V8 diesel. Whichever is fitted, the specifications, torque values and diagnostic procedures for it are set out separately from the chassis and body electrical material.
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
- Tractor truck, low tilt
- Straight truck, high tilt
- Straight truck, low tilt
Trims covered
- D9K020 Gliders - High Tilt
- D9K042
- D9K064
- D9L042
- D9L064
Known issues on the 1988 Astro. No recalls stand against this truck federally, and no owner complaints are recorded with NHTSA. That puts the weight of the manual on its technical coverage: procedures, specifications, torque values, wiring diagrams and diagnostics for the three named diesels, and the same for the tilt cab, frame, driveline and electrical system of the tractor and straight truck versions. For a fleet running several of these side by side, the value is in having one reference for all of them.
