As anyone had any issues with SiriusXM signal strength? I recently had an aftermarket radio installed with Sirius and they had to put a new tuner in. I previously had Sirius included on my stock radio and never had any issues at all. Right now I've had it for 3 days and it has worked maybe 5% of the time. It says no signal and cuts out constantly when it does find it. I see the little black cube antenna is on the top of the dash at the window in the middle. I will be returning to the shop that installed it but I just wanted to hear other experiences and possible solutions.