The 2006-2007 GM Duramax 6.6L LLY and LBZ are the best of the best(8th Digit of the VIN number will be "2" for LLY and a "D" for LBZ). This is the Duramax that every one is looking for... Pre emissions, 6 speed Allison, stronger rods and no DPF. The basic difference between the LLY and the LBZ is horse power, the LLY makes do with 310 hp and 605 ft/lbs., while the LBZ is stronger with 360 hp and 650 ft/lbs. These two motors are identical, so any part that fits a 2006 LLY will fit a 2006-2007 LBZ Classic. 2006 was also the last year to row your own gears, the ZF-6 - 6 speed manual truck went away for 2007.
We have compiled a list of parts that worked on our own 2006 Duramax LBZ's, so we'll give you an honest opinion of what we feel is the best bang for your buck.
Give us a call, let us field all your questions, we promise you won't be disappointed.