I started to hear a rough sound coming from the front end and saw excessive front tire wear. I did have a 6" Pro Comp lift kit installed and got a "SAFETY INSPECTION" notice from Pro Comp claiming this problem but Chevy was not admitting to the problem and Pro Comp wanted to release themselves of any possible problems so Pro Comp Suspensions is replacing the ENTIRE HUB ASSEMBLY FREE OF CHARGE with Factory Chevy 4 wheel drive hubs and also replaced my front 2 35" tires FREE!! Thanks Pro Comp..SCREW YOU CHEVY!!