Stumbled across this while gathering safety equipment for my half ton, bolt in parachute mount for the Silverado's. Fits half tons but the bumper bracket to frame holes is the same I believe on the 3/4 tons.
http://www.motionraceworks.com/stor...uck_Silverado/Sierra_Parachute_Mount_Kit.html
http://www.motionraceworks.com/stor...uck_Silverado/Sierra_Parachute_Mount_Kit.html