I'm looking at a super clean '04 dually w/63k miles. I've never owned a diesel & would like to know the ins & outs does & dont's & maintenance procedures for this truck. It's an automatic, fully loaded. 5.9 Cummings turbo diesel, I drove yesterday, no smoke, no surging, didn't feel like anything was wrong, in fact I could hardly feel engine running, tranny shifted crisp. It's equipped w/special tow package, so I'm assuming 4.10 gears but I'll find out. Any & all advice is appreciated. Thanks Dave SS/ea #1355