In 2007, I had the chance to choose between the 2007 LBZ Duramax (pre-08 EPA diesel regs), and the 2008 LMM Duramax (first year DPF). Chose the 2007 LBZ. Pretty flawless 150k miles, and the LBZ has continued to be a highly sought after Dmax. I paid 39k cash, employee program, for a loaded LT, and it was well spent.
Two riding friends who bought the LMM were not as lucky, with many first year issues, causing downtime, tho repairs covered under warranty. Just didn't know when they would start on fire until they got them deleted and reprogrammed. I got lucky, but sometimes the proven designs do work. Another bud now has a 14 PS 6.7 pretty loaded bought new for 58k, and it has been a great truck for him, business and personal. Just saying that value and proven reliability in a truck goes a long way.
Two riding friends who bought the LMM were not as lucky, with many first year issues, causing downtime, tho repairs covered under warranty. Just didn't know when they would start on fire until they got them deleted and reprogrammed. I got lucky, but sometimes the proven designs do work. Another bud now has a 14 PS 6.7 pretty loaded bought new for 58k, and it has been a great truck for him, business and personal. Just saying that value and proven reliability in a truck goes a long way.