Nope all hand tightened, followed instructions with kit they sold me, in fact here is what they say if rail only sits on one rib of pickup box.
Shim will be used to support the rail. Place shim
between ribs of pickup box and center front to back of rail.
But in talking with them my rail in the bed spans two ribs and sit flat and does not tip at all, my problem is the underneath, my two fords had no issue, and my last GMC that the hitch came out of never had an issue either, so not sure what to think, but looks like a shim of some sort up top in box would have worked.
But according to the instructions am my talking to Demco I should not have an issue.
Here is what he said in one e-mail.
Sorry to hear about the difficulty in the installation. I haven't heard that this install on a 2003 GMC has been a problem. I'm assuming you are using hole #1, #3 & #5 on the rail.
Does your frame look different than the one pictured in the instruction?
