First of all I want to say that I am a registered user of this site and I do have a 68rs/ss Camaro. My problem is the poor gas mileage on my daily driver. I recently bought a 1999 Chev 3/4 ton, crew cab, 4x4, with the 5.7 litre 350, auto trans. My problem is that it only gets 9-10 mpg. It has a K&N air raid filter system, dual exhaust, and 285-16inch tires, if it matters. When I bought the truck it also had a Hypertech Programmer Plus hand held computer programmer that you can load to change shift points, increase hp., etc. I had the computer reloaded back to the stock settings in hopes that whoever loaded it before had it loaded incorrectly. It did not work! It still has been getting about 9 mpg. Also, I don't know what gears I have in the rearend and the "check engine" light does not come on. Any help would really be apreciated. I'm tired of buying GAS!!!Thanks for any help on this!