I use this one. It'll jump my Duramax and everything else I have.
https://www.audew.com/Audew-2000A-Pe...4aAllbEALw_wcB
The Noco 40 and even the 50 wasn't really big enough for most of the cars here that I might need to jump, let alone the duramax. The 40 is only good to 6 liter gas and the 50 only goes to 7 liter gas, neither of them are big enough for the duramax.