The part number for this item is CSJ-C18-3 and it fits 1999-2006 Chevy Silverado and GMC Sierra 1500 2WD Trucks That have CST Upper Control Arms. This kit also fits the 2001-2007 2500HD (with non rebuildable ball joints). If you do not have CST Upper Control Arms, this item will NOT work.
Price is for each replacement ball joint. If you need to replace both sides, you'll need to order two of this item.