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MMW makes H3 plate steel non adjustable control arms with poly bushings too. Could likely get them to build the tubular arms with the poly bushings instead of heims. Probably just another $100 or so. Might even be cheaper
 

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So I'm still waiting for parts unfortunately. But I did some digging and found that the press in diameter of the lower ball joints on both the avalanche and the H3 are 44.6mm. Napa even has a lower ball joint listed that apparently fits both avalanche and H3 as well. So I'd have to say this setup will work FOR SURE. I'm going to start ordering the parts soon
 

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Hey Dusty, I found a different thread with you in talking about putting the h3 hub 8n the avalanche spindle, I was just thinkung if that was possible lol. If you don't get anything soon I might test that theory. If anything the avalanche spindle might need minor machining but if I get to it first ill let you know
 

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Hello new here and I have a question regarding the swap, I’m about to attempt this I’m just trying to figure out if the rear lower control arm bushing is pressed in the frame or arm, I have a skyjacker 4 inch kit on the truck that’s coming off and looking at the truck now(haven’t seen a stock one for reference)and the h3 lower control arm I’m assuming it has to be pressed into the mount on frame thank you for any info
 

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Just smack er in with a hammer, it's not too tight. I had the same issue, as I had the skyjacker kit before doing the swap. Smack the aluminum spacer/bushing out, and replace with a stock one
 

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Silverado knuckles, and I believe avalanche knuckles are the same, will bolt to the lower control arm. Both are the same pitch and ball joint size. Silverado knuckles use a different tierod though. The tierod is smaller on the knuckle than the h3. I am building a colorado with a custom upper, h3 lower and silverado knuckles. I drilled out the knuckle to use a emf 3/4 uniball with a tubular upper a arm.
 

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Figured I could follow up with some pictures. The lower ball joint is the same. The tierod would be a problem trying to swap them in while keeping the stock steering rack. Drilling it for heim joint's would be an easy solution. Or trying to find if a silverado tierod has the same thread on the inner side. I had planned on getting a reamer and just opening up the hole to fit the stock h3 tierod but am going to swap it out for a steering box and build it all with 1 ton stuff.
 

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