1988 Chevrolet V20 Suburban Service and Repair Manual

This factory service and repair manual for the 1988 Chevrolet V20 Suburban lists three naturally aspirated V8s — a 454-cubic-inch 7.4L and a 350-cubic-inch 5.7L on gasoline, and a 379-cubic-inch 6.2L on diesel — under one four-door sport utility body in Scottsdale and Silverado trim. The spread from one gasoline V8 to a much larger one and then to a diesel means three sets of tune-up figures, three sets of torque values and three fuel systems to diagnose, kept separate throughout.

Engines covered

• 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

• Scottsdale
• Silverado

Known issues on the 1988 V20 Suburban. The manual reads as a straight repair reference: engine overhaul and specification data for all three V8s, transmission, transfer case and axle service, brake and steering repair with their adjustment and torque figures, suspension and frame work, and the wiring diagrams and diagnostic charts covering the charging, starting, lighting and instrument circuits.