Silverado 3500 LS mpg for 2003
on the average about 13.5 MPG for the 2003.
I have a 2002 HD Silverado 4WD, crew cab 8.1L Auto Trans. and It gets 10-11 mpg. When I pull a trailer its the same. I got 9.2 mpg once while pulling a 8.5 ft wide x 9ft tall with a flat front, bucking a 30+mph head wind. And I did get 13.3 once, for no reason at all. Great pulling truck. Do the maintenance and service on your transfer case and youll be on the road for along time.
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