I'm sure this has been answered before but I couldn't find anything using search.

Is it possible to use the factory satellite connection with an aftermarket HU? I would assume I'd need a harness but I looked on Crutchfield and it said the factory Sat couldn't be used with many of the aftermarket decks. Can anyone confirm this? Ideally, I'd rather not have to purchase another Sirius tuner/antenna...

Thanks.