Sirius XM Radio is offering free satellite radio from May 22nd 2019 to June 4th 2019. Free in your car, online and on the app.
Available on inactive satellite radios. Satellite and streaming lineups vary slightly. (Some older Sirius satellite radios may not be capable of receiving the free listening channels.)
https://www.siriusxm.com/gmfreelisten
Good until June 4th, 2019