I had this problem today on my 2017 Silverado. Went thru the power cycle with XM cust. svc. to no avail. I waited approx. 30 minutes, then tried it again and it finally came on. you WILL have to send a refresh signal. You can call XM and have them do it or you can do it online. The procedure is listed in one of the previous posts, above. Good luck!