If you are looking to replace your factory radio with an aftermarket radio with SiriusXM-Ready capabilities, it is best to work directly with your Best Buy Geek Squad installation team to see what radio(s) can fit and interface into your vehicle.

You should not have any issue. The Sound Station connects to your Wi-Fi like other devices in your TVs or other devices.

You will need to find an XM CNP1000 which has the XM tuner built into the antenna itself. Unfortunately the CNP1000 has been discontinued for quite a long time (here was the link at Best Buy so you can see what it looks like - https://www.bestbuy.com/site/audiovox-connect-play-xm-satellite-radio-tuner-antenna-for-xm-ready-home-audio-receivers/7118139.p?skuId=7118139 )

Access the menu on your Onyx Plus and select FM in the menu. The FM menu will give you the option to adjust the FM Frequency of your Onyx Plus' FM Modulator to match the same frequency of the "dead" FM station you have found on your FM receiver.

Note, as you drive around you probably will drive towards adjacent broadcast locations that are also broadcasting on that "dead" station and this will eventually cause interference on that station. You can find other dead FM stations for that new location and program additional FM frequencies into the Onyx Plus but to completely eliminate all of this type of interference I strongly recommend you purchase the SiriusXM FM Direct Adapter model # FMDA25 and have it installed in your vehicle. Using the FMDA25 will ensure you will never have to change FM frequencies as you drive around town or even across the country.