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From what I understand, yes.

A programmer... Old SCTx4 would be my go-to. The new ones won't let you disable the EGR.

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What I understand is that you can't really turn off the egr and it needs to be plugged in, even if you block the egr port off. What the tuner(s) do is simply disable the check engine light.
 

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I run a welded cooler on my 05 Excursion and don’t get a light or code.
 
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