I bought the ts5 pkg. that is pre wired for xm, or sirrius. The folks at xm told me to see the dealer, the dealer told me to talk to xm. I cant get a straight answer. I plugged it in the power point but the reception is really bad. If I put the transmitter(black plastic square) on the dash it is bearable. But I got the pre wire for a reason and this isnt it!