1985 GMC K1500 Suburban Service and Repair Manual
This factory service and repair manual for the 1985 GMC K1500 Suburban documents the 4-door sport utility in Base, High Sierra and Sierra Classic trim, powered by either the 6.2L diesel V8 or the 5.7L gasoline V8, both overhead-valve and naturally aspirated. Two engines and one body make for a book that can be specific: separate specifications and diagnostic routines for the diesel and the gasoline V8, and a single, thorough treatment of the driveline, chassis, brake, heating, electrical and body systems they share.
Engines covered
- 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 1985 K1500 Suburban. One recall reaches this model year, and it originates with replacement parts rather than the factory build: certain aftermarket oil filters can fail to seal, so a running engine loses oil and a fire becomes possible. Three owner complaints are logged with NHTSA, covering the fuel system, tires and seat belts, one apiece. This manual covers the corresponding work, with lubrication and oil pressure specifications, fuel tank, pump and line procedures, and belt anchorage torque values along with the checks that confirm the repair.
