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Problems initializing a upac-gm29 in a 2008 escalade

I'm troubleshooting an install in a 2007 escalade.

It is all stock with factory nav and rse.

A upac-gm29 was installed 3 months ago and has beeen working fine.

The customer cancelled the XM subscription and the upac quit as well.

I have performed the pac-instructed reset on the gm29, and reinitialized the unit with the car, but the factory head unit will onl display "XM Busy"

What do I do now?


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