I too have dash rattle..it happened directly after Isuzu dealer kept my Ironman for a month and a half to fix a mechanical issue.

I think they broke more than they fixed and had to keep it for the extra time it took to get the parts to fix what they broke...and also they did not know what they were doing either.

I told them and they turned me away. BBB didn't help out at all.

get a Power vault it will drowned out all those noises.;Dp;