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my buddy has a 2008 ltz 1500 in park we have throttle control and when we put it in gear we have no throttle . any ideas?

I am currently running this tune but it has a slight hesitation

not much luck. I have an 0411

texas speed low lift 216/220, .550/.550 cam , stock injectors. naturally aspirated stock map .

thanks for the help

Does anyone have a tune for 5.3

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