Quote Originally Posted by MarkCO View Post
You are not going to get 18 mpg is a 350 TBI Chevy without about $500 in mods. Once they got into the 5.3L (327LS) engines, 18mpg or better is probable, 2001 or newer.
my 2004 1500 w/30,000 4X4 15-16 mpg city