If you are in a big city and use FM transmission to send audio to your car stereo you probably know the struggle to find an open FM frequency. Thankfully SiriusXM built an FM frequency finder on their website to assist their customers in finding that open channel.
Use this link to visit the SiriusXM Frequency Finder on their website - https://www.siriusxm.com/frequency.
Let us know if you have questions or need further assistance.