When internal steering gear components wear out, your vehicle's steering may feel vague and floaty, leading to lane drifting and imprecise cornering. Turn back time with a new, not rebuilt, steering box from USA Standard Gear. The cure for vague-feeling, worn out power steering units Engineered to meet or exceed OEM quality Designed for easy bolt-on installation Fits 1980-1986 GM 2WD, C10,C20,C30, 1500, 2500, 3500 '87-91 R Series, w/ 32 spline Output Features and Benefits: The cure for vague-feeling, worn out power steering units Engineered to meet or exceed OEM quality Designed for easy bolt-on installation Fits 1980-1986 GM 2WD, C10,C20,C30, 1500, 2500, 3500; '87-91 R Series, w/ 32 spline Output Details: AAP UDA 12: Ea AAP UDA 22: 1 AAP UDA 4: 60 Color: Black Input Shaft Diameter: 0.73 Input Shaft Spline Quantity: Splined w/ Single Flat & Groove Mounting Hole Quantity: 4 Output Shaft Diameter: 1.25 Output Shaft Spline Quantity: 32 Pitman Arm Included: No Power Assisted: Yes Pressure Port Thread Size: M18 x 1.5 Return Port Thread Size: M16 x 1.5 Total Turns Lock To Lock: 3.4 Application Summary: 350 1980-1982 Chevrolet K5 Blazer 1980-1986 Chevrolet C10 1980-1986 Chevrolet C10 Suburban 1980-1986 Chevrolet C20 1980-1986 Chevrolet C20 Suburban 1980-1986 Chevrolet C30 1987 Chevrolet R10 1987-1988 Chevrolet R10 Suburban 1989-1991 Chevrolet R1500 Suburban 1987-1988 Chevrolet R20 1989 Chevrolet R2500 1989-1991 Chevrolet R2500 Suburban 1987-1988 Chevrolet R30 1989-1991 Chevrolet R3500 1980-1986 GMC C1500 1980-1986 GMC C1500 Suburban 1980-1986 GMC C2500 1980-1986 GMC C2500 Suburban 1980-1986 GMC C3500 1987-1991 GMC R1500 Suburban 1987-1989 GMC R2500 1987-1991 GMC R2500 Suburban 1987-1991 GMC R3500 1980-1982 GMC Jimmy 1987 GMC R1500 Applications