This Power Steering Gear Box (Manufacturer Part Number: QS505792QR, OE/OEM Part Number: 27-7589, 27-7617) is compatible with various models including the Silverado 1500 Classic, Silverado 1500 HD Classic, Silverado 2500 HD Classic, Silverado 3500 Classic, Silverado 2500 HD, Silverado 3500, Silverado 1500 HD, Silverado 2500, Suburban 2500, Sierra 1500 Classic, Sierra 1500 HD Classic, Sierra 2500 HD Classic, Sierra 3500 Classic, Sierra 2500 HD, Sierra 3500, and Yukon XL 2500. It features a black color and has a pressure port thread size of M18 x 1.5, an input shaft diameter of 0.66 inches (16.76 MM), and an output shaft diameter of 1.25 inches (31.75
