Hello everyone, I am looking for a 06-07 5.9 QCLB G56 6 speed. The reason I am only looking at 06-07's is because the ability to use EFI Live tuning. There is nothing that a guy can get a decent deal on up here in ND. I am finding quite a few clean and good looking trucks in TX, but they have about 150k-200k miles on them. They look like nice and clean and well taken for and the Carfax reports come back clean and clear. Should I be worried that much about the mileage if its below 200k and the truck looks pretty clean and free of damage? What things are commonly problems with these year of pickups (i.e. body, interior, mechanical)? What things should I look for? What things should I ask the seller (dealer) about? Is there anywhere that I can search the vin # to find all the options the truck came with? How can you tell if it came with 3.73 gears and the limited slip differential? I am sure I will think of more questions to ask, but this is all for now. When I get a moment I will post up the link to a few of the trucks I am looking at. I probably won't be buying until this fall, got some updates I am planning to do to the house this spring and summer which take priority to keep the wife happy. Thanks guys.