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Tune for 2015 5.3L 2015 Silverado

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On 11/3/2021 at 7:47 PM, lucas287 said:

Just fyi for anyone that reads this…all this is doing is changing settings in the TCM. Our truck-based OS isn’t capable of altering anything else when you push the tow/haul button. I’ve tried lots of stuff like this (changing driver demand, AFM settings, etc.) with HP tuners and haven’t gotten anywhere. If that can’t do it, a handheld tuner can’t even either. 


Trifecta isn't a canned tune. I don't have any experience with them but I have read that they've some how managed to gain access to control's hp, efi etc. can't. 

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