1983 Chevrolet C20 Suburban Service and Repair Manual
This factory service and repair manual for the 1983 Chevrolet C20 Suburban covers a four-engine year: 5.0L, 5.7L and 7.4L gasoline V8s plus the 6.2L diesel, every one of them an overhead-valve design fed without forced induction. The body count is one, a four-door sport utility, and the trim count is two, Custom and Silverado. That combination keeps the engine sections busy and the body and interior sections short, with wiring diagrams that vary by equipment rather than by shell.
Engines covered
- 5.0L V8 (305 cu in) — OHV, naturally aspirated, gasoline
- 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
- 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
- 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 4-door sport utility
Trims covered
- Custom
- Silverado
Known issues on the 1983 C20 Suburban. One recall sits on the federal record, and it arrives through the parts counter rather than the assembly line: certain replacement oil filters can fail to seal, allowing engine oil to escape and, near a hot surface, to burn. Owners have logged a single complaint, on the seat belts. The lubrication and engine sealing procedures in this manual give the specifications and torque values that keep that connection tight, and the restraint sections cover belt inspection and adjustment.
