Front Steering Pitman Arm (4-Groove Design)

Heavy-Duty Steering Component for GM Trucks, Vans, and SUVs

Restore the steering response and eliminate front-end play in your vehicle with this Replacement Steering Pitman Arm. As a primary link in your steering system, the Pitman arm connects the steering gear box to the center link, translating your steering input into wheel movement. This specific unit features the 4-Groove (4-Spline) master key configuration, which is essential for proper alignment with the steering box output shaft on compatible heavy-duty and four-wheel-drive models.

Manufactured from forged steel, this arm is built to handle the high stress and torque loads typical of full-size trucks and SUVs. It arrives pre-greased for immediate installation and features a permanently sealed dust boot to protect the internal ball joint from road debris, water, and salt, ensuring long-lasting durability without the need for periodic greasing.

Fitment Verification and Vehicle Applications

This Pitman Arm is designed for the 4-Groove steering box configuration on the following models:

• Cadillac Escalade (Base, ESV, EXT): 2002, 2003, 2004, 2005, 2006.

• Chevrolet Silverado 1500 / 2500: 1999–2006 (and 2007 Classic).

• Chevrolet Suburban 1500 / 2500: 2000, 2001, 2002, 2003, 2004, 2005, 2006.

• Chevrolet Tahoe: 2000 (Non-Z71); 2001, 2002, 2003, 2004, 2005, 2006.

• Chevrolet Avalanche 1500: 2002, 2003, 2004, 2005, 2006.

• Chevrolet Express / GMC Savana 2500 & 3500 Vans: 2003, 2004, 2005, 2006, 2007, 2008.

• GMC Sierra 1500 / 2500: 1999–2006 (and 2007 Classic).

• GMC Yukon / Yukon XL 1500 & 2500: 2000, 2001, 2002, 2003, 2004, 2005, 2006.

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

Technical Specifications and Attributes

• Spline Configuration: 4-Groove (4-Spline) Master Keys.

• Material: High-Strength Forged Steel.

• Maintenance: Pre-Greased (Non-Greasable / Sealed Unit).

• Dust Boot: Included and pre-installed.

• Grade Type: Performance / Heavy Duty.

• Finish: Corrosion-resistant coating.

What’s in the Box

• (1) Steering Pitman Arm (4-Groove)

Industry Cross-Reference Numbers

• General Motors: 12471379

• MOOG: K6536, K6536HD

• Mevotech / Mevotech Supreme: MK6536

• DIY Solutions: SUS06360

Installation and Technical Tips

• Verify Your Splines: General Motors utilized both 3-groove and 4-groove versions of this part across similar year ranges. Before ordering, verify the output shaft on your steering box or the master key count on your existing arm to ensure it features 4 indented grooves.

• Specialized Removal: A Pitman arm puller is required for removal. Avoid using a pickle fork or hammering directly on the gear box shaft, as this can cause internal damage to the steering box seals or sector shaft bearings.

• Sealed for Life: This unit is a "sealed" design, meaning it is pre-filled with high-quality synthetic grease and does not require a grease zerk. This prevents over-greasing and reduces maintenance requirements while the protective boot keeps contaminants out.

• Torque Requirements: The Pitman arm nut requires extreme torque to seat correctly on the tapered splines. Consult your service manual for the exact specification (often exceeding 180 ft-lbs) and use a high-capacity torque wrench for the final tighten.