Quote:
Originally Posted by ParisTNDude
I like your response to the post. Logic would tell you, if GM is willing to pay for the tune ($65), there must be a need for it. It could be that tune was necessary to keep the system CARB compliant or something like that...who knows for sure. However, more air through the intake means more fuel is needed. If the calibration allows that much flexibility, maybe it doesn't need a tune.
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The check engine light will come on and it will run very rich. I put the intake on without the tune and the CEL came on before the tune the very next day.