1985 GMC C2500 Suburban Service and Repair Manual

This factory service and repair manual for the 1985 GMC C2500 Suburban is written around four overhead-valve V8s — 5.0L, 5.7L and 7.4L on gasoline plus the 6.2L diesel — installed in one four-door sport utility body. Base, High Sierra and Sierra Classic make up the range. The book takes the truck apart by system rather than by trim, so engine, transmission, axle, brake, steering, suspension, body and electrical work each arrive with their own procedures, specifications, torque values, wiring diagrams and diagnostics.

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

• Base
• High Sierra
• Sierra Classic

Known issues on the 1985 C2500 Suburban. The manual is a maintenance and overhaul reference: fueling and ignition specifications for the three gasoline V8s, separate figures for the 6.2L diesel, and the torque values, wiring diagrams and diagnostic steps that go with the driveline, brakes, steering and body of the sport utility.