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I have just taken delivery of my new truck ('15 Denali HD) and it has already thrown a couple of codes.

I tried to use my 2 year old Edge CTS and it cannot identify the TC. I was told I needed to update the Edge software so that it could read a 2015 year model vehicle, but I cannot find where to do this.

Any help would be great...

Took the truck to the dealership and it turns out was two trouble codes about the main cooling fan behind the radiator which they fixed.
 

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sell it to me .
 
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