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Everything posted by fritzscorner

  1. Hello everyone. I am kinda new to the party. I just got a 2015 GMC Sierra 1500 Denali with 8" screen and no Nav. I have been going through this forum to try and find out exactly everything I need. So far I am 99.9% sure I need a 2.5 HMI pre-programmed to my VIN as well as a USB adapter to replace the USB with SD Card I currently have. I also see where some people needed a new radio module but I am not sure if I need that or not. **Edit** I should mention that I am wanting this upgrade specifically for Apple CarPlay I had gone through this process with my 2013
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