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15mpg??????
2004gl2 3400.
i gave a full tuneup, kandn air, tried running 93 and yes new fuel filter and fuel injector cleaner. i am still only getting 15mpg cant be normal. ive been in 2 aleros and one grand am with 3.4v6 none had gas mileage this bad there has to be something wrong. no gas leaks,car runs mint. what can be wrong what do i do?? i ran this test 3 times to be sure it was accuate.
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