I had a 2008 Tahoe Z71 before I bought my Raptor 3 weeks ago. I had it lifted, wheels/tires, stereo system, programmer, intake, bumper, lights, exhaust etc... I purchased truck w/ 12K miles on it for $34K and traded it in after returning it to bone stock (b/c like Reptar I kept all factory parts "I wanted to chunk it all many many of times but didnt) got $26K trade in value w/ 97K miles on it. I was able to get most money for it b?c I kept truck in great shape. IO used the Hell out of it, Pulling boats, duck hunting, and just having fun but I always took care of it and glad I did b/c I got the most money possible out of it at trade. Thats a fair deal in my eyes I put 85K miles on it and lost $8K on it. I also was able to part w/ all my aftermarket parts for a extra $3K bucks making my total loss of less than $5K. Just take care of what you have, but enjoy it and keep factory parts, even the factory mats b/c when it comes to trading it in they give you 0 money for all your add-ons sometimes take off money. If you keep them and then like Reptar said spend a few weeks selling them on Ebay, Craigslist, Local Paper, FRF forum wherever you will get you some $$$ and make others happy aswell.