OnStar works, head unit doesn't ?

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mattluttrell

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I just purchased an 02 Escalade. Everything worked in it except mirrors. While checking fuses my headunit stopped working. Rear controls work but I can't do anything with the front unit. No sound for anything.

I assumed my Bose amp was ruined. Out of curiosity I pressed the OnStar button. It worked!

My headunit has power and isn't displaying codes.

Does anyone know why my headunit isn't working?
 

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