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    06 8.1L Vortec Tuning

    :roflmao::roflmao::roflmao: I have an 07 CCLB completely stock and over a 250 mile 75mph drive thru the central valley of Ca. couldn't pull 14mpg unloaded. When I tow my 27' camper @65mph on a flat highway I get 9.5 grossed out at 13.5K. NO WAY IN HELL 14mpg was achieved pulling 18K.
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