I have been watching the market for cat eye duramax's for a while now, and recently a 2007 came under my radar. Its a single cab long bed in graystone metallic, one of my favorite colors. It's set up almost exactly like I want it, minus cab lights. It looks rust free from what I can see from pictures, which is a HUGE bonus here in the rust belt. Heck, the factory rims ain't even gunked up. Supposedly one owner clean carfax, and I don't have enough posts to ask for a vin check, so I may have to pony up and pay for one. Besides the vin check, carfax, and a obd II scanner to check balance rates, what else should I check? Anything specific to LBZ's, or even standard cabs that I should look for? Oh, and it has just under 150k miles. Thanks for the help!