Hello, I have a 2009 GMC Sierra Denali AWD. I just recently purchased a DiabloSport I2030 and not really sure what I am doing. I did the 93 octain tune, turned on hard shifting, removed the rev limiter and put in my tire size. it seems to have made a little difference but I am wondering what else I can do with it.
Thanks in advance.
I'm new
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- Location: South Texas