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Originally Posted by mikejr
I remember when they bumped up the HP in the avalanch from 2003 to 2004 it idled rougher too.
I agree with you, that exhaust sounds AWESOME....thats probably why I am only getting 10.7 MPG, I keep putting my foot into it to hear that rumble. It is sweet sounding.
Mike
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Yeah, that new rumble is definately worth the extra .20 a gallon.