1986 GMC C7000 Service and Repair Manual

This factory service and repair manual for the 1986 GMC C7000 documents a six-engine lineup and three ways of building the truck. On gasoline there is the 6.0L OHV V8 and the 7.0L V8; on diesel, the 8.2L V8 and the 10.4L V8, each listed turbocharged and naturally aspirated. The designations C7D042, C7D044 and C7D064 were bodied as a medium conventional tractor, a medium conventional straight truck or a conventional cab and chassis, and the figures for each engine and each configuration are kept distinct.

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
• 10.4L V8 (636 cu in) — naturally aspirated, diesel
• 8.2L V8 (501 cu in) — naturally aspirated, diesel

Body styles covered

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

Trims covered

• C7D042
• C7D044
• C7D064

Known issues on the 1986 C7000. The manual offers what a medium-duty shop needs day to day: procedures, specifications, torque values, wiring diagrams and diagnostics for the four diesel variants and the two gasoline V8s above, plus the chassis work common to all three of the body configurations the truck was sold in.