I'm in an argument with a guy trying to say that the duramax is based off of a 6.3 gas motor. I'm telling him he is wrong. Am I right?
Ask him who makes or made the 6.3 gas motor.
It's a GM/Isuzu/Bosch combined design not based on ANY gas engine design. Isuzu has been the leader in midsize diesel design and operation for over 70 years. Your dealing with an idiot who likes to argue over something they don't know anything about or got poor info some where and takes it for the bible. You know what they say about arguing with an idiot? Don't do it. Let him speak his foolishness to others who know better as well. He will label himself. Put it down and walk away.
Pretty sure he is thinking of the GM 6.2 diesel
Ask him who makes or made the 6.3 gas motor.