something is definitely wrong.. you are probably running too rich, i would go with the reprogram.
I would expect a notable decrease with the extra 3" lift. do you have anthing up top??? roof rack wise?? 80-85 is a good clip for the h2, I find that running a bit slower makes a huge difference in the mileage.. your rig is probably downshifting a ton to keep your speed, that devours the gas. I run low 70's and get much better mileage. but i do have stuff up top that decreases my mileage.
unaslob
Corsa Sport exhaust(offroad 'tip'), Gobi rack w/ lights & w/roof mounted tire w/ ladder, Warn Winch with rear power, Dual Wolo Airhorns w/ lanyard valve, Hadley Aircompressor 130PSI, 14" airtank, front and rear quick disconnects for air, Cobra 75 WX CB, Dual 4' Firestik fiberglass whips, front tinted windows, 7" Homer Simpson decal (teehee)!
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Corsa Sport exhaust(offroad \'tip\'), Gobi rack w/ lights & w/roof mounted tire w/ ladder, Warn Winch with rear power, Dual Wolo Airhorns w/ lanyard valve, Hadley Aircompressor 130PSI, 14\" airtank, front and rear quick disconnects for air, Cobra 75 WX
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