i have a 4.8 ext cab and its running like shit right now which has made me think of getting a little honda so that i didnt have to drive it everyday. but as i thought about it more, with the money id be spending on a car, that would be plenty of fuel saving mods and gas for a while. thought id see what people thought the best fuel saving mods were.
i got a 4.8 ex cab and i get about 16-18 driving around time..ive just learn to slow down and take time....and also GM didnt guaranteed all vehicle just like 15 of them or something...but im getting a diesel and those get 20 miles to a gallon plus then you can fill half tank with diesel and then other half with brand new veggy oil from costco...its about 6 for 5 gallons.