Truck shopping 04-07 model years. Advice please.

They get poor fuel economy until warmed up, say <5 minute run times. This also can increase wear on some of the components. They take longer to warm up than a gas engine say below freezing ambient temps. In addition there are some known design/manufacturing issues on the big 3 diesels in the 04-07 model year range.

All these things are already well documented in the gas vs. diesel thread. There are benefits to each. I have both. But there is no one right answer for every situation.