1986 GMC C1500 Suburban Service and Repair Manual
This factory service and repair manual for the 1986 GMC C1500 Suburban serves the four-door sport utility across Base, High Sierra and Sierra Classic trim, with three engines on the list: the naturally aspirated 5.0L and 5.7L gasoline V8s and the 6.2L diesel V8, all overhead-valve. Because the same chassis carried power units this different, the engine chapters are self-contained, while the shared work of brakes, steering, axles, body and wiring is documented once and applies to every version of the vehicle.
Engines covered
- 5.0L V8 (305 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
- Base
- High Sierra
- Sierra Classic
Known issues on the 1986 C1500 Suburban. Nothing is recorded against this model year with NHTSA, neither recalls nor owner complaints. The manual's usefulness lies in its ordinary content, which runs from engine overhaul specifications for the three units listed through transmission and axle procedures, brake and suspension service and the full set of wiring diagrams. Torque values are given with the procedures they belong to, and the diagnostic sections show how to confirm a fault before any part comes off the vehicle.
