Looking to get a newer Truck than what I currently have, just looking for mainly things that are common problems to watch for. I thinking 06-08 Quad 4x4 w/100k loved my 6 speed, the 1st one anyway, never an auto.

both are great trucks, both have flaws as with anything man made.

HVAC doors break, front end ball joints, if 6.7 plugged DPF's and EGR's power windows and door lock sometimes stop from broken wires in the door jams.

Biggest thing is the injectors which can be rather spend at 3,000 to 4,000 dollars to replace. On the 6.7 its the EGR system that is huge problem. The amount for carbon build up is something you have to keep up with. VGT turbo and it's failures.

You talking about injectors on the 5,9L?

I think both. Anything after an 02 is pricey. The newer the more pricey is how I understand it. No personal experience.