Stumped the service center at the dealership again, No XM Signal

I have a lifetime sat subscription and no reception problems unless momentarily I go into a tunnel or covered area. But even then it is not that bad and comes back in a moment or 2 Sounds like a wiring issue. As someone else mentioned, do you have a subscription? I would suggest having a like car next to it and seeing if that gets signal. That would tell you if it is a hardware/reception issue. I would find another dealership, obviously these guys don't know what they are doing!!!