DBECHEN,
We have a 2008 Duramax SRW 2500HD extended cab and it pulls our 3010RE just fine. I certainly know it is back there but get excellent acceleration when merging, etc.
about 10,000 miles ago I put on air bags that helped the ride but even before that no real complaints.
Our pin weight is about 3,300 pounds so we are overweight for our year truck and you will probably be too. In my opinion the 3010 is a little nose heavy but we also have washer dryer up in nose. And to make things worse I just added a 32 gal aux fuel tank. But the 500 or so overweight does not bother me. You have to decide that for yourself.
But we love the rig and think you will too.
I used to get 10 - 12 MPG when pulling but now get 12 - 14 as I am now adding a cetain booster to the fuel.
Feel free to PM me if you have any specific questions
Good luck.