It depends on several things:
1.) Year of Truck
2.) Engine Size
3.) Rank (1500, 2500, 3500 etc.)
4.) Gearing
5.) Size of Truck (reg cab, ext. cab, mega cab...etc)
Find the specific info you are looking for, then ask again.
The fuel efficiency of a 2009 Silverado varies greatly based on it's engine size and the features it is equipped with. While the Hybrid Silverado gets about 21 MPG, the standard Silverado gets an average of around 13 MPG.
www.fueleconomy.gov 15 MPG city 20 MPG hwy
About 12 MPG. HWY. 10 in town
My 2005 silverado crew cab /6.0 averages 15.2 mpg
10-14 mpg is what my silverado gets
The EPA mileage estimate for the 2002 Chevrolet Silverado-1500 is 15 mpg in the city, 19 mpg on the highway.
The EPA mileage estimate for the 2014 Chevrolet Silverado-1500 is 18 mpg in the city, 24 mpg on the highway.
The EPA mileage estimate for the 2012 Chevrolet Silverado-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2009 Chevrolet Silverado-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2013 Chevrolet Silverado-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2011 Chevrolet Silverado-1500 is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2005 Chevrolet Silverado-1500 is 14 mpg in the city, 20 mpg on the highway.