I am looking to buy a new duramax would you buy a 2009(LMM) or wait and buy a 2010(LML) and why. thanks

2010 will have Urea you have to buy and add to a tank for emissions. This is untested first year stuff and adds expense per mile to you. The LMM already costs you 10% of your MPG over older non-DPF engines. Who knows the MPG penalty for the 2010 engines, but, you bet the environmentalists and gov't don't care.

Love my LMM. Powerful, reliable and good looking. I'm sure the LML will be good also.

I am looking to buy a new duramax would you buy a 2009(LMM) or wait and buy a 2010(LML) and why. thanks

I think unless you get a smoking deal on the LMM go for the 2010. If you buy the 2009 the resale value will be much less from the start. The new LML may have the new urea, but there's a good chance that it will have a seperate injector for cleaning the DPF where the LMM uses the regular fuel injectors fired after the combustion event to accomplish this. With the LMM this causes crankcase oil contamination, shorter oil change intervals, possible engine damage or increased wear especiallly when using biofuels. Ask me how I know.
I have read reports that the LML has improved fuel economy over the LMM because of the improved efficiency of this after burner system and the effectiveness of the urea.

As a side note, If you're really worried about the whole urea thing, I'm sure it won't take long for someone to figure how to safely bypass the urea injection.

Plus you'll be able to tell you're buddies you got a "new" truck with the 2010 and you can order exactly what options you want, not just pick what's on the lot.

I With the LMM this causes crankcase oil contamination, shorter oil change intervals, possible engine damage or increased wear especiallly when using biofuels. Ask me how I know.
I have read reports that the LML has improved fuel economy over the LMM because of the improved efficiency of this after burner system and the effectiveness of the urea.

As a side note, If you're really worried about the whole urea thing, I'm sure it won't take long for someone to figure how to safely bypass the urea injection.

Plus you'll be able to tell you're buddies you got a "new" truck with the 2010 and you can order exactly what options you want, not just pick what's on the lot.

Sounds like you got unlucky with an early build. I've had no issues, hope that continues.

Good advice on ordering, with so many options is great to have the exact options and combos you want.

The LMM has been proven already (all the bugs worked out of it) I love mine and would recommend the LMM to anyone

I think unless you get a smoking deal on the LMM go for the 2010. If you buy the 2009 the resale value will be much less from the start. The new LML may have the new urea, but there's a good chance that it will have a seperate injector for cleaning the DPF where the LMM uses the regular fuel injectors fired after the combustion event to accomplish this. With the LMM this causes crankcase oil contamination, shorter oil change intervals, possible engine damage or increased wear especiallly when using biofuels. Ask me how I know.
I have read reports that the LML has improved fuel economy over the LMM because of the improved efficiency of this after burner system and the effectiveness of the urea.

As a side note, If you're really worried about the whole urea thing, I'm sure it won't take long for someone to figure how to safely bypass the urea injection.



Plus you'll be able to tell you're buddies you got a "new" truck with the 2010 and you can order exactly what options you want, not just pick what's on the lot.

From what I've read and understand the DPF and how the fuel is used on the exhaust stroke will remain the same. The "extra" injector into the exhaust is just for urea to catalyze NOx into NH3. As far as the better fuel economy and more power will be contributed to the piezo injectors over the common rail system. This is were the new LML will shine, especially for the mod lovers.

I think unless you get a smoking deal on the LMM go for the 2010. If you buy the 2009 the resale value will be much less from the start. The new LML may have the new urea, but there's a good chance that it will have a seperate injector for cleaning the DPF where the LMM uses the regular fuel injectors fired after the combustion event to accomplish this. With the LMM this causes crankcase oil contamination, shorter oil change intervals, possible engine damage or increased wear especiallly when using biofuels. Ask me how I know.
I have read reports that the LML has improved fuel economy over the LMM because of the improved efficiency of this after burner system and the effectiveness of the urea.

As a side note, If you're really worried about the whole urea thing, I'm sure it won't take long for someone to figure how to safely bypass the urea injection.

Plus you'll be able to tell you're buddies you got a "new" truck with the 2010 and you can order exactly what options you want, not just pick what's on the lot.


X2, I want one but I just got my LMM the way I want it and it only has 23K miles.

As GMCtech says the Biofuel option will be better on the LML at up to 20%; solving the oil dilution issues the DPF cleaning system has on the LMM.

But that new tank to fill... Who is gonna carry this stuff?

LMM is a fine machine, love this truck!

I think unless you get a smoking deal on the LMM go for the 2010. If you buy the 2009 the resale value will be much less from the start. The new LML may have the new urea, but there's a good chance that it will have a seperate injector for cleaning the DPF where the LMM uses the regular fuel injectors fired after the combustion event to accomplish this. With the LMM this causes crankcase oil contamination, shorter oil change intervals, possible engine damage or increased wear especiallly when using biofuels. Ask me how I know.
I have read reports that the LML has improved fuel economy over the LMM because of the improved efficiency of this after burner system and the effectiveness of the urea.

As a side note, If you're really worried about the whole urea thing, I'm sure it won't take long for someone to figure how to safely bypass the urea injection.

Plus you'll be able to tell you're buddies you got a "new" truck with the 2010 and you can order exactly what options you want, not just pick what's on the lot.

If you're going to bypass the urea system on an LML, you could also say that the DPF could be removed and the regen programmed out on the LMM. With the DPF removed and regen programmed out, any issues with bio-fuels or fuel mileage are resolved.

On the other hand, if you're going to leave them stock, I'd rather not have to deal with the urea.

As GMCtech says the Biofuel option will be better on the LML at up to 20%; solving the oil dilution issues the DPF cleaning system has on the LMM.

But that new tank to fill... Who is gonna carry this stuff?

I just read an article a couple weeks ago about a few truck stops that are selling urea already, cant remember the name of the station though

I have a LMM '09 recently purchased because of price. Not likely to find super deals on the '10 right out of the box. By the time I'm ready to trade in 2-3 years, should be able to get a new one at invoice or below.

I vote LMM, should be able to find a steal of a deal

I heard a rumor the other day that the urea is freezing up at temps below -20* C.

I would look into that a little more depending on your location....perhaps someone here can either confirm or deny that rumor...

Is it KNOWN for sure what Bosch ECM the LML will have? A few months back there were concerns of the LML having the european version of the ECM that is unhackable. As far as, LMM vs. LML, LMM hands down, issues with fuel in oil due to DPF can be handled much easier than trying to disable DPF, Urea, along with who knows what else. Chris