I had a HD radio installed and can't get very many HD stations. I am thinking it is an antenna issue. Question is, where is the FM antenna located? I have an 05 H2. The mast antenna on the cowl was missing, so I replaced it and the signal didn't go up at all. I looked at some dealer fische and it indicated it is the shark fin on top of the vehicle. I looked at it and it says XM, so I assume it is the Satellite antenna. Any ideas? Thanks