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I am interested in your stock navigation system if it helps, as long as I get the right price?
OK Back to the point.
From what i found out from GMParts Direct My has an amp with part number
20808897
I test drove an 2009 Tahoe LTZ which the stereo sounded MUCH Better and had the UQ3 option. I gave that vin to GMPartsdirect thy came back to me with a partnumber of 15186661 for the amp and the wire harness 25781989
Can anyone verify if this will work with the head unit part number 15940103 / 25857365