2003 GMC Sierra 1500 z71. I looped the front tabs until I saw the perfect circle. Old suspension removed. Punch the welded tabs all the way in to get 4 holes. The new one showed up immediately. It worked great, it just took a while.
Pros
Fits: 1999-2007 GMC Sierra Classic 1500; 1999-2007 Chevrolet Silverado Classic 1500; 2007-2013 GMC Sierra 1500; 2007-2013 Chevrolet Silverado 1500; 2007-2013 Chevy Silverado/GMC Sierra New Body 1500; 2007-2013 Chevy Silverado/GMC Sierra Hybrid Models