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I have a quick ? I have a 2011 denali xl awd. if i buy the computer ecm and tcm and have that tuned can gm still tell if the truck has been tuned if i put my stock computers back in? just wondering for warranty ?
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Unfortunately, with the 2011s, you can not remove the ECM and TCM. Your only option for tuning is inperson or the AutoCal. I would recommend the AutoCal, you can personally return your truck to stock for dealer visits. With the current methods GM uses, they can not see that your vehicle has been tuned, when you return it to stock.
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i plan on doing my intake and exhaust......is this somthing i should have done before i consider a tune???