Quote:
Originally Posted by HWG
They can do this at the dealership.
I would definately not re-flash the ECU if you are concerned about maintaining your warranty.
not really sure about this and the post say'in can't be done ..I think it is a dealer thing as mine said they do it when they do the "Custom trucks "..so I guess you just have to check with your dealer / stealer
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I am telling, they cant. Not since the new GM Global platform came out which was around 2010 depending on the car model. The trucks havent been able to do it since the 2014 models came out.
The dealer can only flash the ECM with the factory OEM calibration that is in the system from GM. They cant make any changes at all for tire sizes.
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