1991 GMC R2500 Suburban Service and Repair Manual

This factory service and repair manual for the 1991 GMC R2500 Suburban comes down to one trim, Base, on the four-door sport utility, with three naturally aspirated overhead-valve V8s available: 7.4 liters and 454 cubic inches, 6.2 liters of diesel at 379 cubic inches, and 5.7 liters at 350 cubic inches. A single trim makes the wiring diagrams straightforward to follow, and the rest of the book keeps the same shape, giving procedures, specifications, torque values and diagnostics system by system.

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

Known issues on the 1991 R2500 Suburban. The manual delivers reference material across the vehicle — engine procedures and specifications for the 7.4L, the 6.2L diesel and the 5.7L, brake, suspension and steering figures for the chassis, driveline procedures, and wiring diagrams with the diagnostics needed to use them.