possible to flash 15-17 with 18 MRC tune

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Fifty

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It has been said on this and one other forum the 18 Denali has a different MRC tune and rides much better. A significant difference is what it is being described as. Does anyone know if the older vehicles can be reprogrammed? I talked to GMC and they said I had to ask the dealer...great thanks.

I have an appointment with the dealer on weds but they said they didnt know and would look into it. They have been not very up to speed on gmc factory aftermarket like the brakes, intake and exhaust, so I dont have a lot of faith in them actually looking into this.

Anyone here work at a dealership that might know, or know anyone they can ask?

Im trying to flash my 15i denali xl with a 18 denali Xl mrc tuning.
 

JTRATX

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Curious of this myself. My denali is an 8/17 build and it rides awesome, I wonder if mine may have the 18 flash you are referring to or if there is another flash after mine.
Not sure how much better it could get....
 

Ct Pirate

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I've got mine coming in this week I'll check the build date. When did they release the update?
 

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