Gas mileage on a 2004 gmc yukon xl Read Also: Gmc yukon xl 2004 gas mileage Gas mileage for 2004 gmc yukon xl Gmc yukon gas mileage 2004 2004 Gmc yukon denali gas mileage 2004 Gmc yukon xl 2500 gas mileage 2004 Gmc yukon xl gas mileage