What to look for in a used Duramax?

[Huck]

Holy shit cody I didn't know your truck had that many miles

 

[GR$$N$]

hell yeah. why do you think im cutting it up and making it into a prerunner. to me its not worth selling

 

[marc]

lbz or go. i have 306k on my 07 classic. fantastic truck. stock motor still and trans

thats almost 3x as much as mine ....what is done to the engine ? and what are you putting down for hp ?