Below is a thread started a while back by a very likeable bloke from the UK . Ermmm that would be me
Some say ..... His personality is so magnetic, he is unable to carry credit cards ..... and he once taught a German Shepherd to bark in Spanish.... (So sory, I'm wayyyyy to into BBC Top Gear)
Seriously though,
You can use either the 'source' button on your steering wheel or the 'preset' button on your center stack next to volume to switch from FM to AM to XM. If you have an XM tuner already installed on your car, you should receive XM channel 01 which is adverts to get you to sign up. While set to XM, you turn the 'tuner' knob one click counter-clockwise to reach XM channel "0" and your tuner ID will be displayed. That's the ID number you need when calling XM to start your free trial.
LINK:
xm-radio-in-your-m-t573315.html?hilit=XM