BBB Industries 503-0123 Steering Gear

Reman Steering Gear for GM Vans

BBB Industries Reman Steering Gear 503-0123 is a remanufactured electric steering gear built for power steering applications in select Chevrolet and GMC vans. It is specified for 1983-1991 Chevrolet G10, G20, and G30, as well as GMC G1500, G2500, and G3500 models.

This steering gear is built around key service dimensions including a 1.25 in. output shaft diameter, 0.72 in. input shaft diameter, 26 input shaft splines, 32 output shaft splines, M18x1.50 pressure port thread, and M16x1.50 return port thread. The unit also features 4 mounting holes and 3.688 turns lock to lock for direct steering system service.

Key Features

• BBB Industries Reman Steering Gear, part number 503-0123
• Remanufactured electric steering gear for power steering systems
• Fits 1983-1991 Chevrolet G10, G20, and G30
• Fits 1983-1991 GMC G1500, G2500, and G3500
• Input shaft diameter: 0.72 in. / 18.29 mm
• Output shaft diameter: 1.25 in. / 31.75 mm
• Input shaft spline count: 26; output shaft spline count: 32
• Pressure port thread size: M18x1.50; return port thread size: M16x1.50
• Installation kit included: Yes

Product Details

BBB Industries 503-0123 is a reman steering gear for GM full-size vans that use power steering. The remanufactured construction supports steering system repair when the original gear shows wear, leakage, or excessive play. With the listed shaft sizes, spline counts, port threads, and 4-bolt mounting pattern, this steering gear is specified for direct replacement service on the covered Chevrolet and GMC applications.

This part cross-references 19321371 for the same application.

Common Repair Uses

• Steering looseness or excessive free play
• Fluid leakage at the steering gear housing or ports
• Hard steering or inconsistent steering response
• Worn internal gear components in the steering box
• Restoring steering control on Chevrolet G10, G20, G30 and GMC G1500, G2500, G3500 vans

Installation Notes

Verify the vehicle is equipped with power steering before ordering. Match the input and output shaft dimensions, spline counts, port thread sizes, and mounting hole pattern to the original unit before installation. After replacement, inspect the steering linkage, hoses, and fluid condition, then bleed the system according to service procedures.

Quality Assurance

BBB Industries supplies remanufactured steering components for service replacement applications. Part number 503-0123 is built as a reman steering gear for the listed Chevrolet and GMC vans and includes an installation kit.