1990 Chevrolet C70 Service and Repair Manual

This factory service and repair manual for the 1990 Chevrolet C70 pairs two bodies, a medium conventional straight truck and a two-door cab and chassis, with a five-engine list weighted toward diesel: turbocharged and naturally aspirated 8.2L V8s and a turbocharged 10.4L, set against naturally aspirated gasoline V8s of 366 and 427 cubic inches. Codes C7D042 and C7D064 identify the chassis, and the procedures, torque values and diagnostics follow its engine, driveline, brake and electrical systems.

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

• Straight truck, medium conventional
• 2-door cab & chassis, conventional

Trims covered

• C7D042
• C7D064

Known issues on the 1990 C70. The manual answers the questions that come up on a truck of this weight: how the diesels are serviced and to what specifications, what the gasoline V8s take for ignition and fuel work, how the transmission, driveshafts and axles are set up and torqued, and how the brakes, steering and electrical circuits are adjusted, wired and diagnosed.