Quote:
Originally Posted by Evil-Bee-NH
2.0T guy here so forgive my eavesdropping but i think the issue is GM for the last 3 years has changed the ECU accessibility every year. 2016 you could easily tune your ecu and tcm if you had an A8. 2017 they security locked the ECM and TCM seperately and made it obnoxious and extra expensive to tune from my understanding is they added even more security with the 2018 model year.
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I know that the TCM for the A8 has to be sent to HP Tuners, to be unlocked, prior to being able to make any modifications to the transmission tuning. I was told by a reputable tuner that they have been tuning the 2018 V6 using HP Tuners, so it is possible to unlock them. The only reason I know this is because I asked him on a Facebook thread, because I thought it was odd that HP Tuners lists the 2016-2018 2.0T, 6.2, and the supercharged 6.2, as being supported, yet only list the 2016-2017 3.6 V6 as supported. The tuner told me that HP Tuners has been lagging on updating their website, due to the introduction of their new MPVI2, and that they should have the supported vehicle list updated to include the 2018 3.6 V6 as soon as they can.
Barring the fact that an aftermarket company is capable of tuning the 2018 model year V6, how hard should it be for GM to unlock their own ECU? If they programmed the ECU, they should know how to unlock, and reflash it.
I could understand if GM had designed their ECU like the older Honda ECU, so that it was impossible to write to them at all, but that does not appear to be the case. At this point, it just comes across as GM not wanting to put in the small amount of effort to change a few keystrokes, to allow the ECU reflash on the 2018 model year.