1990 GMC R3500 Service and Repair Manual
This factory service and repair manual for the 1990 GMC R3500 covers two configurations, the four-door cab and chassis and the four-door crew cab pickup, in Base and SLE trim. Three naturally aspirated overhead-valve V8s are listed: 7.4 liters at 454 cubic inches, 6.2 liters of diesel at 379 cubic inches and 5.7 liters at 350 cubic inches. Trucks in this class usually work under an added body or a heavy load, and the chassis, brake and driveline sections carry the procedures, specifications, torque values, wiring diagrams and diagnostics that calls for.
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 1990 R3500. The 1990 R3500 has a clean federal record: no recalls and no owner complaints with NHTSA. Wear is the real subject on a truck of this age and class, so the most-used sections are the ones covering load-bearing hardware — brake overhaul procedures and specifications, suspension and steering figures, axle and driveline service, and the torque values that go with them — alongside full engine coverage for the 7.4L, the 6.2L diesel and the 5.7L, and wiring diagrams with matching diagnostics.
