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Originally Posted by kev2809
curious if yours is lifted any or does it have oversized wheels and tires?
my avalanches MPG dropped drastically after a body lift and 20s with 33s.
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No lift and stock tires on mine. How about before your lift and tires? I’m not expecting 20+ mpg, but I am expecting way more than 11-12… Again mine isn’t running right and should hopefully improve when/if I can get it dialed in.