Looking to check out some HP tunes you guys have, I know the EFI guys have standard tunes available like 75-100-150 horse tunes, that everyone kinda shares around. I just wanna check out what everyones working with.

 

I would not trust any the free efi tunes floating around for duramax. A bad tune can easily tear alot of stuff up. I personally dont know anyone tuning duramax's with hpt.

 

Depends on what year Duramax. The early ones have some basic tunes. The 10/10 tune is very popular.
Here is a good link.
http://www.hptuners.com/forum/showth...ets-LMM-tuning