Replacement XM Satellite Antenna
 

The elements have finally dry rotted and split my OnStar Antenna. After looking around I couldn't find one without an outrageous price so I matched up the equivalent Chevy/Cadiallac one which is GM Part # 25758073 for $20. Hope it helps someone!

Moderator: meant to say OnStar, not XM Satellite in the threat title but I don't have the ability to change it.