The only thing that I hear on 104.5 is KIQO, Central Coast's Classic Hits station. Before KHTN 104.7 moved their Transmitter to MT. Bullion, I have heard various pirates on 104.5 for years, one was a golden oldies format for a while in the early 90s strong signal in Clovis, It was in mono, then there was a pirate playing a unusual mix of Alternative that had a very strong signal in the Tower District, then more recient there was an Asian language format with a strong signal in SouthWest Fresno.
Sounds like somebody is doing Two illegal things, one broadcasting illegally and 2nd rebroadcasting Sirius's feed.