GMC Sierra 3500HD Ball Joint - Upper - Cognito Alpha PRO (2011-2025). A heavy-duty, serviceable upper ball joint engineered for Cognito press-in style upper control arms on your Sierra 3500HD.

Built around a patented bootless scraper seal, Alpha PRO avoids the torn dust/grease boots that plague conventional joints. It arrives pre-greased with Lithium Complex Grade 2 and a top grease fitting so you can purge contaminants. Alloy steel internals with no plastic liner, alloy races, and a carburized, coated taper pin with an oversized sphere deliver strength, wear resistance, and generous articulation for IFS use.

Features

• Patented scraper-type bootless seal (U.S. Pat. 10,731,700)
• For Cognito press-in style UCAs, 2011-2025 Sierra 3500HD
• Greaseable top fitting; pre-greased Grade 2 lithium complex
• No plastic liner; alloy internals, races, and grease paths
• Carburized, coated taper pin; oversized sphere contact
• Zinc-plated housing; high-angle articulation; billet cap

Questions or need help confirming fitment? Call us at 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations in Austin, Texas and the Los Angeles, California area, where we offer installation and customization services.

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov