I recently read about and became convinced that I needed a diesel. I'm a lifelong GM man, so I bought an 01' Chevy 2500HD ext. cab with the 6.6 duramax. I had a guy tell me "the first 2 things to do", which were upgrade the intake and exhaust (airaid intake, 4" magnaflow exhaust). Now I want to know what else I can do to it? I'm not looking to take this thing to the strip or pull sleds, but I pull a 30' 5th wheel and I can always use better fuel milage! I'm just new to this arena so any explanation of how things work, and what upgrades will get me is very much appriciated! I also like my truck to look good, it's chromed out (probably too much) and I put my big mirrors on, but any accessories you know of would be great too! Thanks in advance for any help! Shed