Yep, the sway bar is very close without the relocation kit, but I doubt that is your knock, but hopefully it is. I really don't have a guess what it is. Are you sure it's in the front? Was thinking you did the blocks so maybe something with the rear springs.I been banging my head against the wall on this.. I just installed the Eibach lift from Peak Suspension.. And so far I love it! But about a few days after, i got a knocking sound, first on the passenger side now I'm thinking it's on both sides.. Me and my friend did the lift and he's done a few lifts at his shop so I know we took our time to do mine "6 hours" to be exact. Got the truck aligned and threw 265/70/17 tires on it looks good rides good besides this knock. Doesn't happen all the time but when it does you hear it! After alot of stare and compare to my bosses truck since he has the exact same lift and has the same truck his a 2017 mine 2016 2.8 Z71.. Seems like my sway bar has only about a half of inch in between both sides. His I can fit all my fingers between spring and sway bar. Mine I barley can put a finger if not just the nail of my finger. So I ordered the relocation kit and also longer sway links to pray!! This is what alrighty knocking when alittle flex happens. Just thought I'd share to see what else it could be.. I've torqued bolts twice after Install ALL bolts I touched or took off.. All bushings look good no squishing of any of them. I've been reading on here for about a week now at others comments and opinions so I said F it Im post my problem and see what Colorado colleagues can chime in and give me feedback. Also I'm at the 2.7" seeing and 1" lift block in back also have the diff drop that I'm going to install when the sway bar parts come in.. Thanks 💯
I had a knock that sounded like something hitting the firewall, could that be it? It was over small rough stuff off road. I never "fixed" it but I heard it is the bracket under the LF wheel well that makes the noise. It holds the fender or something. Anyway, it was pretty annoying but didn't happen all that much. It stopped on it's own.