how can I improve mpg on a chevy silverado 1998 2500 4x4 350?
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how can I improve mpg on a chevy silverado 1998 2500 4x4 350?
I have a 1998 3/4 tone 4x4 350 silverado. I get 10 to 12 mpg but when hauling a horse trailer I get 7 to 8 mpg. What can I do to improve the mpg. I do have to be able to pass emissions test.
