1985 Chevrolet C20 Suburban Service and Repair Manual

This factory service and repair manual for the 1985 Chevrolet C20 Suburban documents a wagon that carried four engines and no alternative body: the four-door sport utility, offered in Custom, Scottsdale and Silverado. Under the hood, the 5.0L, 5.7L and 7.4L gasoline V8s and the 6.2L diesel are all overhead-valve and naturally aspirated, so valvetrain and cylinder-head work follows a common pattern while displacement-specific clearances, torque values and timing specifications are called out engine by engine.

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
• Scottsdale
• Silverado

Known issues on the 1985 C20 Suburban. One recall appears on the federal record. It concerns replacement oil filters whose sealing surface can let go, so oil leaves the engine while it runs and can ignite. Two owner complaints exist for the year, both on tires. Neither subject is deep water for this manual: the engine sections give oil pressure testing and lubrication specifications along with the torque values for the filter mounting, and the chassis sections cover wheel, hub and axle service together with the alignment figures.