Looking for 13's
edit:
take your subs, plus anything in your trunk out. every lil bit helps. my trunk stuff is about 200 lbs extra weight.

And like Derek said, lose the subs and any other extra unneeded weight, assuming you migrated them from the Silverado, if not, you're cherry
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Before my tune in Auto it shifted at 48 and 89, after 51 and 101.
When are you getting the tune and DP.



