When I purchased my truck used I went over it with a fine tooth comb washing, waxing, removing dirt, etc. I went over every square inch of the truck, even pulled the seats and cleaned. When I was washing the rocker panels I noticed a 4" section that seemed soft on the passenger side. It had some deflection when you pushed on it hard, more than the same spot on the other side. I took it in a week after I bought it to have my list of things I found wrong fixed(alignment, rough idle, that spot). They said that there was no issue with the rocker and that it was normal. Same thing with the rough idle, no codes found so it is normal. They did do an alignment and that took care of the pulling to the left.
Fast forward now that winter is over, there is now cracks in the paint and visible rust on that exact spot on the rocker panel. Pushing on it and it gives completely. I think the paint is the only thing holding it together and it obviously rusted out from the inside.
I installed aftermarket steps after they finished their work and said there was no issue. They bolt into pre existing holes in the rocker, no new holes were drilled and they use the factory mounting points. Before I take it in to get them to fix the rust, do I need to take the steps off? I don't want them to blame the steps for this issue or charge me for taking them off, which they will have to do to repair the rocker. Anyone had rocker rust warranty done and had steps?