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You should do a search first.
Ultimately it depends on your dealership and your relationship with your SA. some are mod friendly and even encourage mods. Others are completely against them.
Regardless of that, I would always stress no software updates unless there was something critical (most recently in my opinion being the LCI dash display recall)
It's up to you to do your research for your SA. But if you want to be safe just flash stock and lock DME
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