Nice to read all these positive things about GM trucks. I have a 03 2500HD with the 8.1/Allison as well and I sure do like it. It's got just over 40K miles on it. I had a 2500# slide in camper since I bought it and it pulled it fantastic. I was a little concerned about how the gas engine would perform when we upgraded to the 5th wheel last summer since we live in Colorado and do a lot of pulling through the mountains. I have been very impressed how well the big block pulls the 5th wheel. It still looks and rides like new so if I can get another 10 years, that would be fantastic.
