looking at getting a 06 Denali
 

Found an 06 Denali duramax with 135k miles and they want 24k for it. I am on the fence about having truck payments so I want to make sure it'd be worth it. Right now I have a 99 7.3l powerstroke that is a good running b**tch. What would be some things to look for with it before buying if there are any