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#2
06-27-2012, 02:24 PM
Hummer Authority
Join Date: Jan 2008
Location: Gaithersburg, MD
Posts: 1,763
Re: high octane fuel question
95?! WOW!
I'd think you'd be fine with no programming change...
...however, I'd be temped to put in a 'Performance' tune and spend the weekend mashing the pedal on that fancy Autobahn; especially if you've got the 5.3.
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