I got a 2004 Envoy XUV loaded with the 5.3 which I absolutely love! I would buy another in a heartbeat if they made them. I have a dog and do light construction so, having the inside 8 foot bed inside, is a really nice feature. This truck gets 19mpg on the highway in 2wd and has the 4wd option. So, the gas millage is decent. My question, I know these 5.3s are great engines and wondering what I can get to replace this one with all or close to all the same features. Now, I'm looking at the Suburban to get close to what I have now but not really interested in spending more money on fuel. What would you guys do?