BamCam

You should contact these guys. http://www.mcgaughys-suspension.com/ When I was in the market for a '14 4x4 I contacted them and they told me their '13 3/5 kit should work on a new truck as the suspension is very similar. They did not get a chance to test on a new truck yet but told me if I purchased the kit and had any problems with the kit or install they would give me a full refund. I believe the guy's name was Sean. This was 2-3 months ago so they may have had a chance to install one on a 4x4 since then. Hope this helps.

I am deciding in the next week to order or not. My dealer is telling me that GM shuts down for the whole month of December. They are saying it could be 12 weeks if ordered today!!! Is there any truth to this?