2006 Chevrolet Cobalt SS Supercharged 2dr Coupe (2.0L 4cyl S/C 5M)
Getting 14 to 22 miles to the gallon of gas. Have taken vehicle back to dealer and they say they cannot do any thing about the problem because there are no codes showing. GM will not even talk about the gas mileage.
Vehicle does have fairly good pick up.
Gas mileage has to get better, There has to be a way to fix the problem.
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