Hummer H2 Engine Poor Mileage

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Hard to Start Idle Erratic Idle Rough Knock Misfire Not Cranking Over Not Running Overheat Poor Mileage Rattle Revs Up Runs Rough Stall While Driving Surge

I Just Bought A 2003 H2 I Know They Have Horrible Mpg...

2003 HUMMER H2

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Asked by David7734

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