Thanks guys, I ended up taking the truck to Mark at Done Right Diesel over in Glendale. He seemed to be honest and straight forward. Copperhead was a really long ways for me to coordinate with the seller.
I did end up buying the truck. Its got a few issues that i’d like to sort out, so I think I am going to start a new thread with some photos and a list of questions for everyone haha I am coming from a 96 powerstroke, so the duramax is a whole new deal for me.
Brand new to me, 2006 LBZ motor w/LLY tune (I think?). CCSB 4x4 LT model, white in color. 6 speed trans with tow button and +/- switch.
221,000 miles, all original, bone stock for now.