Chevy colorado mpg?

Question

does the size effect the mpg

say there were two chevys 1 is regural cab and the other is extended what would the mpg difference be thanx

and are there chips to help mileage

Answer 1

weight effects mileage of course. extended cab about 2 miles per gal on in city.  Chips would effect the horsepower and decrease your mileage.

Answer 2

go to your chevy dillers and ask