hey all, im new to the forum and i just figured i could get some questions i had answered on here. i just got my first truck, its a 2000 Silverado 1500 with a 5.3L Z71/4x4. I've just been looking to start doing some upgrades/putting some stuff on to make it a little faster/more powerful but also making the gas millage go up a little bit. Some obvious first things that i want to do are put a K&N intake on it, exhaust(either magnaflow or corsa if i feel like spending that much) and maybe a chip. Now i have alot of questions that need to be answered. I've been talking to my dad about it and he says that alot of this stuff i put on my truck will not boost it as much as it says because its a 4 wheel drive. An example is that i said "i want to get a hypertech chip, it will give it some boost in HP and alot of people say that they get a millage increase of 1-3 MPG." his reply is usually "well since yours is 4x4 its heavier, has more parts, so your not really going to get a millage boost." Is this true? Can somebody answer this for me? These are just the beginnings to the truck, but right now i have some money and the first thing i want to buy is something thats going to make power and millage go up, but i dont want to slap down 400 bucks for a chip thats not going to do anything. If anybody can answer my questions, recommend me stuff for my truck, or throw in some input, that would be good. Any kind of feedback or input would be appriciated. And thanks ahead of time for the replys!