'07.5 LMM here. Basically the same as the LBZ, but with the DPF and new body. I've had it since new and it has been an excellent truck. I traded my '04.5 LLY for it. I wanted a dually and the 6-speed Allison. I've replaced the alternator and several glow plugs, as well as brakes and rotors in the rear. That's about it. I do baby it as far as maintenance goes and I have a daily driver for work and other things. It only has 61,000 miles on it and just this week I replaced the original batteries. I've been real happy with it going on 9 years, and due to the cost of a new one, it's not going anywhere.