1990 GMC R2500 Suburban Service and Repair Manual
This factory service and repair manual for the 1990 GMC R2500 Suburban serves the four-door sport utility in Base and SLE trim. Under the hood the choice was between a 454 cubic inch 7.4L gasoline V8, a 379 cubic inch 6.2L diesel and a 350 cubic inch 5.7L gasoline V8, every one a naturally aspirated overhead-valve design. The book works through the vehicle system by system — engine, fuel, cooling, transmission, axles, brakes, steering, suspension and electrical — with procedures, specifications, torque values, wiring diagrams and diagnostics for each.
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
- Base
- SLE
Known issues on the 1990 R2500 Suburban. Nothing is on the federal record against the 1990 R2500 Suburban — no recalls, no owner complaints. Its service story is about wear rather than defects, and the manual is arranged to support that, holding the original clearances, adjustment figures and torque values for the three V8s and the chassis beneath them, plus wiring diagrams and diagnostics that let a fault in the lighting, charging or accessory circuits be followed to its source rather than guessed at.
