45 mpg on the highway 45 mpg on the highway
The EPA mileage estimate for the 2004 GMC Sierra-1500 is 14 mpg in the city, 19 mpg on the highway.
The EPA mileage estimate for the 2014 GMC Sierra-1500 is 18 mpg in the city, 24 mpg on the highway.
The EPA mileage estimate for the 2001 GMC Sierra-1500 is 14 mpg in the city, 18 mpg on the highway.
The EPA mileage estimate for the 2006 GMC Sierra-1500 is 14 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2005 GMC Sierra-1500 is 14 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2012 GMC Sierra-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2011 GMC Sierra-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2013 GMC Sierra-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2008 GMC Sierra-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2003 GMC Sierra-1500 is 14 mpg in the city, 19 mpg on the highway.
The EPA mileage estimate for the 2007 GMC Sierra-1500 is 14 mpg in the city, 19 mpg on the highway.
The EPA mileage estimate for the 2002 GMC Sierra-1500 is 15 mpg in the city, 19 mpg on the highway.