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The Cognito Alpha upper ball joint for 1999–2018 Chevrolet Silverado and GMC Sierra 1500 is a heavy-duty, rebuildable press-in joint that keeps core housing in the control arm for easy servicing. A corrosion-resistant zinc-plated housing and alloy internals let the joint be rebuilt without removing the arm. A scraper-type seal replaces a fragile dust boot and a top grease fitting allows simple periodic lubrication to extend service life.
Cognito 99-18 Chevy Silverado/GMC Sierra 1500 Alpha Ball Joint for Cognito Upper Control Arms
