I've done the GM Nav conversion, but not the LUX amp yet. I really like the GM Nav because of the integration with the rear seat DVD and rear seat audio. However, if you don't have (or need) those features, the aftermarket would be the better way to go, IMO.Ben has a few good threads detailing how to switch over to GM Nav and lux Bose...that'd be the way to go:thumb:
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