I have a 03 Silverado 6.0 4L80 4X4. I am towing a 6 X 12 enclosed trailer to SoCal on Monday (12 Jan) and want to see if there can be some changes to my tune to get a little better MPG. I have attached my current tune and a couple scans. I wanted to do a WBO2 scan but I have not heard back from PLX Tech Dept.
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