Sirius XM RAdio XM Onyx User Manual page 75

if you drive in or near large metropolitan areas.
NOTE! The SiriusXM FM Channel Finder relies on data from the Federal
Communications Commission. The data may not reflect the latest stations in
your area. In addition, local geography and weather conditions can impact
reception, so your results may be different from the list.
NOTE! The performance of FM radios are different, based on manufacturer and
vehicle style. Some may not work well with the type of FM transmitter used by
OnyX. This is why we recommend a direct audio connection using the Aux In
Cable or Cassette Adapter if they can be used in your vehicle. Professional
installation can also resolve almost any performance issue.
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