I currently have a 2006 Silverado ECSB 4x4 4.8. I love the truck but i have found a 2005 Silverado CCSB 4x4 2500HD 6.0 that I really like. I have no idea what kind of trade I can get and that dictates whether or not I would get it. I just need to know if the 2500HD is something I would be happy enough with to justify going through the mess of trading. The 2500HD is a manual transmission. In the ad they say 6-speed but my searches are showing that was only an option on 8.1 and Duramax. Looking forward to everyone's opinion. By the way my current truck has 149K with a little rust starting under the back doors and the 2500 has 101k and is very clean.