My 2003 STL has a factory installed Siius unit behind the glovex and the factory single CD/FM radio unit. When I bought it used, the truck also has what looks like an after-market mount on the dashboard which has a 3/4" (?) male thread in the middle. Below the mount are two wires. One is a power connector and the other is a small multi connector. The antenna is still on the dash and has "Sirius" on it. Does anyone know what the tuner was?

I have just installed a Pioneer 6000 model head unit and am curious to know if I can replace the Sirius tuner and make it work?
Steve

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