how can the LML be the 4th generation Duramax?

[Micheal Tomac]

http://special-reports.pickuptrucks...t-silverado-heavy-duty-first-look-part-2.html

The Duramax V-8, dubbed “LML" internally, is the fourth generation of GM's HD diesel since it was introduced in 2001. Sixty percent of its parts are new, and Duramax chief engineer Gary Arvan said it will be 11 percent more fuel efficient than the previous LMM Duramax.

Update: Feb 11, 2009 4:52 PM
Though there are five RPO codes for Duramax engines produced and improved since 2001 -- LB7, LLY, LBZ, LMM and LML -- Arvan clarified for us that the LBZ Duramax was primarily an update to the LLY's existing controls. That's why the LML is considered the fourth Duramax.

I think the Duramax chief engineer is confused about the differences between the LLY & LBZ. There is a huge difference between the LLY and LBZ and hardly any difference between the LMM and LBZ (other than the partical filter).

 

[2500HeavyDuty]

they must of forgotten the lly's :rofl:

 

[paint94979]

they must of forgotten the lly's :rofl:

you can never forget about the LLY's

 

[TheBac]

Id have thought the LMM was the "odd man out".

 

[duratothemax]

I thought the exact same thing when reading all of those press documents Micheal...

LBZ was an update to the LLY's existing controls??? HUH?? Yeah well the LBZ was an update to the 2006 LLY's existing controls...

the LBZ has nothing in common with the "REAL" LLY...the one we all know and love that was made from 2004.5-2005.

There is no explanation to his statement that the LML is the fourth generation dmax. Thats simply not true...the [real] LLY was maybe 30% different from the LB7. The 06LLY/LBZ was maybe 45% different from the [real] LLY. The LMM is maybe 10% different from the LBZ, and the LML looks to be about 50% different from the LMM...

those above % could be argued, but the fact is, the LML is the FIFTH generation. Calling it the fourth gen is ridiculous.

ben

 

[McRat]

LB7 - No or little smog, hidden injectors. 300HP
LLY - First serious smog, exposed injectors, new turbo and ECM. 310HP
LBZ/LMM - Big HP jump, all internals updated, all new computers. 360/365HP
LML - Piezo injectors, all internals updated, ???. ~400HP

LML = Fourth gen based on interchangeability of parts. Though it could be argued that LBZ and LMM are different enough to be different generations.

 

[TheBac]

Isnt the only real difference between the LBZ and LMM the emissions equipment, not necessarily the actual engine parts?

 

[duratothemax]

Isnt the only real difference between the LBZ and LMM the emissions equipment, not necessarily the actual engine parts?

exactly....so I think its fair to say the "LMM is an update of the LBZ's existing controls"

but to say the LBZ was an update of the LLY's existing controls doesnt make sense...

 

[Micheal Tomac]

maybe pickuptruck.com mixed up the engine rpo codes

 

[TheBac]

exactly....so I think its fair to say the "LMM is an update of the LBZ's existing controls"

but to say the LBZ was an update of the LLY's existing controls doesnt make sense...

Well Ben, keep in mind these are GM engineers we're talking about.....
:rofl:

 

[PhilsLB7]

Is that General Motors engineers or Government Motors engineers you're talking about?

:rofl:

 

[LBZ]

An engineer is an engineer. You can tell them anything you want but don't ever tell one he's wrong!!

 

[whitetrash21]

Isnt the only real difference between the LBZ and LMM the emissions equipment, not necessarily the actual engine parts?

Injectors (tips) and turbos... minor differences. Still not enough to create as big a gap in generation as there is in the LLY/LBZ though.