1991 Chevrolet R3500 Service and Repair Manual

This factory service and repair manual for the 1991 Chevrolet R3500 narrows to two trims, Cheyenne and Silverado, and two four-door bodies, a cab and chassis and a crew cab pickup. Three engines are covered: the 7.4L gasoline V8 of 454 cubic inches, the 5.7L gasoline V8 of 350, and the 6.2L diesel V8 of 379, each an overhead-valve design without forced induction. The specifications, torque values, wiring diagrams and diagnostics are organized by system, so engine work and chassis work stay separate.

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

• Cheyenne
• Silverado

Known issues on the 1991 R3500. One recall appears on the federal record for these trucks, and it concerns replacement oil filters rather than factory hardware: the affected filters may not seal adequately, which can let the engine lose its oil and, in the worst case, start a fire. Owner complaints number two, both about the service brakes. That is a small sample, but brakes on a truck this heavy are worth attention, and the manual gives hydraulic, adjustment and diagnostic procedures for them alongside the lubrication specifications the recall makes relevant.