Sirius Satellite Radio [Nasdaq: SIRI] and Hertz are expanding their cooperative agreement to offer satellite radio to Hertz rental car customers. Beginning Tuesday, Hertz and Sirius will offer satellite radio to customers at major airports in Atlanta, Chicago, Dallas/Ft. Worth, Detroit and Houston.

By July, Hertz plans to offer satellite radio in 33 airport markets. Along with the major market expansion, Hertz, a Ford Motor Co. [NYSE: F] subsidiary, will also be expanding the vehicles available with Sirius to 28 different vehicle models.