[pound41]

I have a 2003 GMC 2500 HD Ext cab 4x4 8.1L Allison trans. Bought it new. it has 171k on it. The gas mileage from my experience is not has bad as people say. On the highway it cruises. I have never towed with it but I have a steel contractors cap on it. that took 4 of us to get on the truck. Steel ladder rack on it. 4 large extension ladders. The bed and the compartments are filled with my tools. I don't know the exact weight but its a good amount. all of that has been on since it was new. .Has a 410 posi rear. I was thinking of getting rid of it at some point. In doing some research about values etc. I read obviously the 8.1L is not quite at the level of the diesel but was rated as being a close 2nd and was deemed a really good gas set up for towing. I have driven several 6.0L. Theres a little difference in the torque . Good Luck