BBB Industries N503-0128 Steering Gear

New Steering Gear for Heavy-Duty GM Trucks

BBB Industries New Steering Gear N503-0128 is a new electric steering gear built for select Chevrolet, GMC, and Dodge applications with power steering. It is specified with a splined input shaft, 3 mounting holes, and included installation kit for a direct replacement on supported vehicles.

Use this steering gear for Chevrolet C/K-series trucks, Suburban models, Tahoe, Express 3500, GMC C/K-series trucks, Savana 3500, Yukon, and select Dodge Ram applications that match the listed steering and port specifications. Part number N503-0128 is also referenced by OE numbers 19321376 and 26068771.

Key Features

• Brand: BBB Industries New Steering Gear
• Part number: N503-0128
• Electric steering gear for power steering systems
• New, not remanufactured
• 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
• Turns lock to lock: 3.063
• Installation kit included

Detailed Description

BBB Industries N503-0128 is a new steering gear for vehicles equipped with power steering and the listed splined input shaft configuration. The unit uses M18x1.50 inlet and pressure port threads, M16x1.50 outlet and return port threads, and a 3-hole mounting pattern. With a 26-spline input and 32-spline output shaft, it is built to match the steering linkage and hydraulic connection requirements of the supported applications.

Fits 2005-2006 Chevrolet Express 3500, power steering with splined input shaft. Fits 2005-2006 GMC Savana 3500, power steering with splined input shaft. Fits 1988-2000 Chevrolet C2500 and 1988-2000 GMC C2500, power steering with 8600 lb. GVW (C6P). Fits 1990-1995 Chevrolet C2500 and 1990-1995 GMC C2500, compatible with vehicles equipped with power steering. Fits 1992-1995 Chevrolet C2500 Suburban and GMC C2500 Suburban, power steering with 8600 lb. GVW. Fits 1994-1995 Chevrolet K2500 Suburban and GMC K2500 Suburban, compatible with vehicles equipped with power steering.

This part cross-references OE numbers 19321376 and 26068771 for the same application.

Common Replacement Reasons

• Steering play or loose steering feel
• Fluid leakage at the gear housing or ports
• Hard steering or inconsistent steering response
• Excessive steering wheel free play
• Wear in the steering gear on high-mileage trucks and vans

Installation Notes and Tips

Verify the input shaft spline count, port thread sizes, mounting hole count, and lock-to-lock specification before installation. Confirm vehicle configuration, including power steering and GVW or production-code notes where listed, to ensure the steering gear matches the original setup. After installation, inspect the hydraulic connections, bleed the power steering system, and check alignment.

Quality Assurance

BBB Industries supplies this steering gear as a new replacement component for supported Chevrolet, GMC, and Dodge applications. The new construction and application-specific dimensions help support a proper OE-style replacement on the listed vehicles.