Installed Stull running boards today. They attach by way of brackets that go on the bolts where the cab attaches to frame. When I pulled the bolts, especially the front most ones, I got a sleeve full of water. Not good. Used an angle grinder to cut some D-shaped drain notches towards the back of the steel tubes in the rubber mounts, then painted them with cold galvanize zinc-bearing paint. I don't know if this water retention thing is typical, but it does not seem good for the long haul. I am passing this info along in case it helps others spot or avoid a problem

 

I noticed the same thing when I loosed the cab bolts on my truck. Did you try the bolts in front of the front wheels? I did and there was more water in them than in the other 6 combined. I didn't think of notching the tube and will go back and do the same to mine when the weather dries up from Ernesto. Thanks for the heads-up!

 

I didn't check the front ones (thanks for drawing my attention to those). I'd been planning to do the ones for the bed at some future point; today was just the running board project.