All in all, this has kept up REALLY well. I've had it for about one year, and for a ten year old truck, it is a beast! This is the most dependable vehicle that I have ever had.
It has the leather, blue two tone, tow package, Z71 all in this truck!
The gas mileage is decent for this truck; 16/20 city/hwy. I have researched and researched and researched trucks around the years of '97 and '98, and the K1500 has the best mpgs, best safety rating (look up '98 Ford F-150 for fun), the most power engine, fastest truck, and the most reliable (although a lot of that depends on how the owner keeps up with the vehicle).
I'm a college student and slight mechanic, so I like vehicles that are top notch for their class, and this truck fits the bill. Like I said, I've researched all of these trucks, and for '98 Chevy had the best bet. Don't believe me, do the research yourself. I'm not at all against Ford, but the safety rating pictures and video of that truck going at only 40mph really concerned me. 2003 was a good redesign for Ford, anyway here I am rambling on again about the research, but this is my experience with a '98 Z71.