Truthfull answer, no. Your 6.0 will pull it..but your fuel mileage will suck and it will be very hard on the engine. Does your truck have the Allison trans?? If not, the trans will take a beating. You better read your owners manual on the weight ratings for "your" truck. You might be over the GCVW ratings and 5er rating. Having a Duramax/Allison combo makes a BIG difference in the ratings. Sorry but those are the facts. You might be able to find a good used 2010 or newer that has the D/A without a big money lose. Good luck.