Sirius XM RAdio Onyx User Manual page 44

Vehicle Installation
channel is one that's not being used by an FM radio station in your
area. When you tune your FM radio to an available channel, you should
only hear static or silence – not talk or music. To find an available FM
channel:
• Manually tune through your local FM channels on your vehicle's FM
radio. Locate and create a list of channels that aren't being used by
any FM radio station. Write down the list. Once you have created
your list of available FM channels, you will need to find the one that
provides the best match for Onyx.
TIP! You'll need to use the 'Manual' tune function on your vehicle's FM radio to
tune through every FM channel one-by-one. Turn on your vehicle's FM radio.
Start at 88.1 and use the 'Manual' tune function on your vehicle's FM radio to
tune through each FM channel one-by-one (88.1 followed by 88.3 etc.) to locate
channels that aren't being used by a local FM radio station. Write down each FM
channel that has only static or silence on it, until you reach 107.9.
6 Ensure Onyx is tuned to channel 1. Upon power up, Onyx should tune to
channel 1 by default, when it's not yet activated. If it's not on channel
1, refer to "Listening to Satellite Radio" on page 55 to learn about how
to tune a channel.
7 Pick the first FM channel on your list from step 5. Turn on your vehicle's
FM radio (if you have not already done so) and tune it to this FM channel.
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