 Here's what can happen. If you haven't checked it for a while and there's a seepage coming out over time, that power steering fluid will seep out. You can also look at the steering gear as well. But those typically didn't leak. Not common for them to leak. The pumps would leak and the hydro boost would leak. And I'm betting because I know those trucks pretty well, those hydro boosts have a tendency to leak, especially at that mileage. Yep, I would think so as well. And what kind of job is that to replace it?