I bought a 2004 Z71 Tahoe from the original owner in 2009. After owning the last 6 years, I can say it is the best, most comfortable vehicle I have ever owned. It has 199k miles on it and has only had a few minor issues (1) water pump went out around 140k miles, replaced, (2) began using coolant at a slow rate but no leaks. Mechanic said it was seeping into a cylinder and being burned, recommend I use Alumiseal. I used and it fixed the problem, (3) recently had the "Service Airbag" light come on. I found out the most common problem is corrosion on the front impact sensors. Found a website that explained how to replace them, so I did. Solved the problem.
I purchased our 04' Chevy Tahoe new from the Chevy dealer in 2004 as our daily driver family car and let me tell you, it gets driven every day. It is the base model with cloth interior. Sticker price at the time was $38K. It is now 2015 and we have put over 233,000 miles on this same vehicle and it is still running like a champ with no mechanical issues what so ever. Praise GOD! The only issues we have had are the instrument cluster gauge went out at about 150K miles, which is typical with GM vehicles, and the A/C blower was replaced at around 180K miles. That is it. We have not had any engine or transmission problems of any kind. And to be quite honest we have never had the transmission service done ever on the vehicle like the dealer recommends, just routine oil changes about every 5K - 7K miles, sometimes we have even gone as far as 10K - 12K miles before the next oil change. Just check the fluid levels , (oil, Transmission fluid, coolant, brake fluid) from time to time and that is it. Needless to say I will be getting another Chevy Tahoe when the time comes, my goal is to get 500K miles out of this wonderful 04 Tahoe before that day comes. :)
Transmission failed at 81,000. Transmission fluid flushed and transfer case fluid serviced at 47,000 miles by Chevy dealer at a cost of $235.00. Service representative told me that the seal between the transmission and (I believe he said) the transfer case failed and the transmission fluid went into the transfer case. Caused transmission fluid to be three quarts low from the internal leak. Even though no fluid ever leaked out of the vehicle, the GM representative said it was my fault because the transmission fluid should have been checked at each oil change. The transmission failed while I was driving down the highway. Total cost of GM remanufactured transmission $3,922 installed.
This GM vehicle has suffered from some of the "known defects" by GM. The instrument cluster has been replaced under warranty, fuel pump became weak and been replaced, the actuators that control the airflow into the cabin become flaky and will start blowing hot air out (you have turn off the car and restart-I've gotten good at doing this while going down the road). The final straw with this vehicle - excessive porosity in the cylinder heads (again, a known issue with GM supplier's CasTech heads) allows steady leaks into the valve train and gets mixed in with the oil. It has gotten bad (1 gal/month) and now at 105,000 miles, this vehicle has to go unless GM steps up. TBD.
Bought this vehicle used w/ 21,000 miles on it and have now had it for over 4 years and now it has almost 83,000 miles on it. Have had only two minor problems with it, the push button 4x4 went out and had a problem with the steering shaft. I'm debating trading this vehicle, but I hate to so bad. I keep it clean and it just still looks and drives so good. Nothing I've test drove looks or drives as sweet as my Tahoe. This is a great vehicle. Wish I could afford a newer model.