Front Steering Knuckle Spindle Set

Heavy-Duty Steering Components for Chevrolet, GMC, and Hummer 8-Lug Chassis

Refresh your truck's front suspension with this premium 2-Piece Steering Knuckle Set. Engineered for the demanding 2500 and 3500 series chassis, these knuckles serve as the primary mounting hub for your vehicle's steering and braking systems. Over time, heavy-duty use from towing, hauling, or off-road excursions can lead to fatigue in the factory castings, stripped threads, or distorted bearing bores.

Constructed from high-strength nodular iron or forged steel, these spindles are precision-machined to ensure exact alignment of the ball joints, tie rod ends, and wheel hub assemblies. Replacing the knuckles as a pair is highly recommended for high-mileage vehicles to ensure symmetrical steering geometry and to eliminate persistent front-end pops or groans caused by worn-out spindle bores.

Fitment Verification and Vehicle Applications

This set is specifically designed for 8-Lug Wheel applications across the GM heavy-duty platform. Please verify your vehicle's year and series:

• Chevrolet Silverado / GMC Sierra 1500 HD: 2001, 2002, 2003, 2005, 2006 (and 2007 Classic).

• Chevrolet Silverado / GMC Sierra 2500: 2001, 2002, 2003, 2004.

• Chevrolet Silverado / GMC Sierra 2500 HD: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010.

• Chevrolet Silverado / GMC Sierra 3500: 2001, 2002, 2003, 2004, 2005, 2006.

• Chevrolet Silverado / GMC Sierra 3500 HD: 2007, 2008, 2009, 2010.

• Chevrolet Suburban / Yukon XL 2500: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013.

• Hummer H2: 2003, 2004, 2005, 2006, 2007, 2008, 2009.

• Chevrolet Avalanche 2500: 2002, 2003, 2004, 2005, 2006.

• Specific Fitment Note: Fits 2004 Silverado/Sierra 1500 models ONLY if equipped with 8-lug wheels.

Technical Specifications and Attributes

• Quantity: 2-Piece Set (Covers both Driver and Passenger sides).

• Material: High-Tensile Nodular Iron / Forged Steel.

• Finish: Corrosion-Resistant Protective Coating.

• Hub Compatibility: Designed for 8-Lug heavy-duty wheel hub assemblies.

• Configuration: Standard ride height (Not for lift-drop applications).

• Fitment Type: Direct Replacement.

What’s in the Box

• (1) Front Driver Side Steering Knuckle

• (1) Front Passenger Side Steering Knuckle

Industry Cross-Reference Numbers

• General Motors: 25850470, 25850471, 18079493, 18079494, 18060908

• ACDelco: 25850470, 25850471

• Dorman - OE Solutions: 698-016, 698-017

• TRQ: BHA34256, BHA34257

• Hollander: 515-00201L, 515-00200R, 515-01302L, 515-01303R

Installation and Technical Tips

• Bearing Bore Preparation: Before installing your wheel hubs, ensure the inner bore of the new knuckle is clean. Applying a thin layer of anti-seize to the hub's mounting flange will make future removals significantly easier, especially in rust-prone regions.

• Ball Joint & Tie Rod Inspection: Since the suspension must be disassembled to swap the knuckles, this is the optimal time to replace your upper and lower ball joints and tie rod ends. Installing new knuckles on worn ball joints can lead to premature failure of the new spindle bores.

• Brake Shield Transfer: Remember to transfer your factory dust shields to the new knuckles. Inspect the shields for rust or rot; replacing them now will prevent irritating metallic scraping sounds later.

• Mandatory Alignment: Any replacement of a steering knuckle fundamentally alters your truck's camber and toe-in settings. A professional four-wheel alignment is mandatory immediately following installation to ensure safety and prevent tire scrubbing.