1991 GMC R3500 Service and Repair Manual
This factory service and repair manual for the 1991 GMC R3500 is written for the four-door cab and chassis and the four-door crew cab pickup, sold as a Base or an SLE. Its engine list holds three naturally aspirated overhead-valve V8s: a 7.4L of 454 cubic inches, a 6.2L diesel of 379 cubic inches and a 5.7L of 350 cubic inches. Rather than summarize, the book takes each system separately, with procedures, specifications, torque values, wiring diagrams and diagnostics for engine, driveline, chassis and electrical work.
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 cab & chassis
- 4-door crew cab pickup
Trims covered
- Base
- SLE
Known issues on the 1991 R3500. No recalls or owner complaints are on the federal record for the 1991 R3500. The manual is read for its numbers rather than its warnings, then, and it carries them throughout: assembly clearances and torque values for all three V8s, injection specifications for the diesel, brake and suspension dimensions for a chassis meant to work, transmission and axle procedures, and wiring diagrams with the diagnostic steps that make them useful.
