Hey guys, I was talking to my brother today, he wanted me to post a question for him. He accidentally put about 15 gallons of our dyed farm diesel in his 2001 Duramax. I told him not to worry about hurting the truck, but I would check to make sure with you guys. I'm assuming I am correct that it won't hurt his truck, I don't know a whole bunch about Duramax's yet. Thanks in advance, andy