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Re: Gas milage
Not enough information to go on here, engine size? How do you calculate your mileage? There are just too many things that contribute to poor mileage to diagnose easily. Dealer is most reliable for checking cat defects, if not defective the charge is hrly/time for that dealer. Request cost before you authorize the work. Should be covered under warranty if defective, but I am not sure of the "04" model year. Others here may know for sure.
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