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Step 2: Turn on your system Place the GXM 40 where it has a clear view of the sky and turn on your Garmin unit. This automatically turns on the GXM 40. Step 3: Set up the XM account Ensure that your XM WX Weather ID and your XM Radio ID are readily available. Contact XM Satellite Radio by phone at (800) 985-9200. After receiving the required information from you, the XM representative activates the account and sends out an XM signal to activate the GXM 40. You can also activate your account by v