PUN15HR TB

I've been hearing that same sound on my 2022 Trail Boss LTD since new. Dealership first blamed it on loose running boards. Tightened them up and noise was still there. Couldn't figure it out, pretty much gave up saying it was "normal". Took truck to another nearby dealership with same result, basically useless. Now I'm at 27,000 with the same noise and no "fix".