Rattle in the dash

[Waterloo]

I drove a 9900 for a little bit, the one I drove was in the oil fields in Montana and North Dakota... Owned one too, but that was like fifteen years ago... I would pull the dash apart and start tightening things up. And under the cowl, where the windshield wipers mount, might be something lose, like a wiper motor. I hate those trucks, no offense meant, as they tend to rattle themselves apart from my experience.