1990 GMC C7000 Service and Repair Manual
This factory service and repair manual for the 1990 GMC C7000 is written around a chassis offered in two designations, C7D042 and C7D064, and three body configurations: medium conventional tractor, medium conventional straight truck and conventional cab and chassis. Five engines could be specified. Gasoline buyers took the 6.0L OHV V8 or the 7.0L V8; diesel buyers took the 8.2L V8 turbocharged or naturally aspirated, or the turbocharged 10.4L V8. The specifications and torque values for each are kept apart throughout.
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
- 2-door cab & chassis, conventional
Trims covered
- C7D042
- C7D064
Known issues on the 1990 C7000. There are no recalls on the federal record for this truck and no owner complaints logged with NHTSA, a clean result on both counts. Practically, that shifts the weight of this book onto its reference sections. Those cover the five engines individually with procedures, specifications, torque values, wiring diagrams and diagnostics, and then the systems every C7000 shares regardless of how the chassis was eventually bodied.
