I bought my 99' Tahoe in 05'. I bought it with 82,000 miles on it. It now has 107,000 miles. The fuel pump went out. I talked to a local mechanic in town and told me that the cost of purchase and repair will be $1,100.00! I've never laughed so hard in my life. I went and bought a fuel pump and replaced it myself in 2 days for $130.00. Replacing it yourself sucks, but I have more money now and I know how to change the pump. My lights for the radio have begun to go out too. I'm not going to pay the deductible to get the lights fixed. I'm just going to get a new stereo because it's better and cheaper. My O2 sensor went out and replaced that for $90.00. One of the spark plugs that I was replacing broke in half in my hand when I swapped it out. I replaced all of the plugs for 20 more bucks. These are problems that are inherent to any vehicle of any make. I'm proud of Chevrolet and their products. Its hard to make stuff perfect for every person that buys them.
Congrats on a great vehicle and for being able to do your own repairs. It DOES save a bundle. I seldom take mine in for anything I can do myself. We love GM cars and trucks (though my current truck is a Ford). My wife loves her Envoy, and my old Pontiac runs as good as the day it was built (and looks that good too). GM builds some really great, reliable vehicles.
If you have the correct tools you can work on just about anything with a little know how. That's awesome you saved money a lot of money, but how did you figure out how to change your fuel pump? Nice work though.
The lights in the radio are very simple to replace if you have basic soldering skills. The bulbs can be purchased at Radio Shack, I can't remember the part number but they are small incandescent bulbs and are around $1.50 each.