X2 with the above. I have the ReadyLift kit and it's definitely worth the $$$. As for the tires, I would go for either BFGs, Goodyears, Toyos or Nittos.I would use the ReadyLift leveling kit for your Silverado. If you have the factory shocks I would replace with Rancho or Bilsteins. Both have shocks for trucks with leveling kits installed.