Do what I did and buy a LBZ for 33k with 22k miles on it.
:rofl:
My Dad just bought a 2012 Denali HD with the LML. It has 2000 miles on it and is already having issues. It's at the dealership right now getting a new DEF tank because one of the 3 heaters in the tank failed and apparently they can't just replace it. The truck has gone through 3 regens and used close to 5.5 (guestimate) gallons of DEF. I had him fill it up the day he brought it home. Couple days ago the countdown (100 miles till 65mph max came on) along with a check engine light. I put in another 2 gallons and went the rest of the morning fine, then same light came on again. Went to the dealer and then forced a regen and said everything was fine. Gets 5 miles down the roads and a check engine light again.
We've had a mild winter and the truck stays in a heated shop at night that is 60-65*
So now the truck has been at the dealership for 2 days now, and they had to air-freight a new DEF tank here from Michigan I believe.
DEF is an idiotic band-aid for emissions control. It's a terrible idea and complicates and makes everything more expensive, plus IT IS A PITA.
I will say the new frame is amazing and the LML has plenty of power in stock form. With 14-15k behind the truck you can't tell it is there. (T16 trailer, Bobcat with bucket, forks and an 84" compactor.) It tows amazing. There is a great feel from the brake pedal.
I chose a 2007 LBZ over an LMM because I hate the new body style. It's ugly, sheet metal is even thinner than the GMT-800. The rockers/doors make it really hard to clean. Everything in the interior (especially the denali) scratches easily. Really an overall style-less pickup IMO
Sure body lines are tighter and some say the interior is better (personal preference). There are literally Denali 2500hds running around everywhere around here.
I wouldn't get anything but a Denali if it were a GMT-900. Only truck that looks decent from the factory.
Granted GMT-800's aren't the best looking stock, a few simple mods make a huge difference.
What happens when these trucks get 100-150k on them and stupid little shit like a heater in the DEF tank goes and makes the truck throw codes and be all-around pissy? Sounds like a PITA to keep a truck reliable with all the little stupid things that can happen with the added emissions equipment, not to mention having to replace those pieces at a premium.
Just my .02
Edit: If they find a way to pull all emissions equipment all my gripes with the LML would be gone. I wouldn't put an H&S unless it was just to delete the emissions stuff on my truck but if EFILive decided to support it it would make me very happy to pull all that crap and add a small tune to it.