1989 Chevrolet C70 Service and Repair Manual
This factory service and repair manual for the 1989 Chevrolet C70 has four bodies to account for, a medium conventional tractor, a medium conventional straight truck, a low-tilt straight truck and a two-door cab and chassis, against two codes and five engines. Two are naturally aspirated gasoline V8s of 6.0 and 7.0 liters; the rest are diesels, the 8.2L V8 turbocharged and naturally aspirated, plus a turbocharged 10.4L. Wiring diagrams and chassis specifications track the body as built.
Engines covered
- 6.0L V8 (366 cu in) — OHV, naturally aspirated, gasoline
- 7.0L V8 (427 cu in) — naturally aspirated, gasoline
- 8.2L V8 (501 cu in) — turbocharged, diesel
- 10.4L V8 (636 cu in) — turbocharged, diesel
- 8.2L V8 (501 cu in) — naturally aspirated, diesel
Body styles covered
- Tractor truck, medium conventional
- Straight truck, medium conventional
- Straight truck, low tilt
- 2-door cab & chassis, conventional
Trims covered
- C7D042
- C7D064
Known issues on the 1989 C70. There are no recalls against the 1989 C70 and no complaints from its owners on the federal record. With four bodies built on the one chassis, the manual's usefulness is in how far the shared material reaches, through transmission, driveline, axle, brake and steering specifications and torque values that apply whether the truck pulls a trailer or carries a body, and in the engine sections, which give separate procedures and diagnostics for the gasoline V8s and the 8.2L and 10.4L diesels.
