I am maxed out with the 3010. I strongly suggest upgrading. You will have no trouble pulling it but your weight is going to over in every other aspect. You are under what the Duramax will pull ( tow capacity of 16,700) but everything else is going to be over.
Someone told me once, that the Duramax will pull anything. Getting it stopped is another story. The brakes could be better for such a work horse.