The parts prices are insane. Besides the 1/3 to 2/3 parts price increases since they became Government Motors,Chevy jacks them way above regular Silverado parts. They don't want people building fake SS I guess.
Just the front bumper,ALL brackets, front bumper cap,lower grille, air ducts will run $1500+
Do yourself a favor. Go and try to find the parts first and price them. Your better off finding another truck.