Upgrade apim to get higher Sirius chanels

If you mean upgrading APIM firmware you can refer to these threads and it should help you get sorted with upgrading the firmware:

However that being said, it is not really a matter of APIM firmware when it comes to Sirius XM as much as it is the ACM. Newer model ACM units handle the Sirius signal differently than previous generations and therefore allow for the full catalogue of channels among other features.

You can still try upgrading your APIM firmware and updating to the latest version of SYNC (which is 3.4.20282) if you wish, but just be cautious as the procedure of upgrading firmware could leave your unit temporarily or permanently bricked.

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