LLy/Lbz differences?

[HudB1]

New to the duramax arena, whats the difference between the two and how can you tell?
Thank You
Hudb1

[More Power]

The following two links explain what is new in the LBZ.

http://www.thedieselpage.com/features/2006MY.htm
http://www.thedieselpage.com/duramax/2006enginenewsrelease.htm

The following link discusses the 2004 LLY.
http://www.thedieselpage.com/duramax/lly2004.htm

Now, the 2006 LLY and LBZ engines will look the same. RPO codes in the glove box or VIN numbers will tell you what you've got.

Jim

[mattlewis]

the badging on the new "HO" dm is also different. basically, 40 more HP, some more torque, 6 spd allison with manual shift on the gearshifter.

and about $2000 lol

[JohnC]

I bought one of the last 2006 LLY's on the last day of "employee pricing". (I think they were waiting for that program to expire before releasing the LBZ) Anyhow, I'm very happpy with what I got, but haven't a clue how many of the LBZ "improvements" I have. For example, what's my compression ratio? I do like the 6 speed Allison, though...

Quiet? When I cranked it up for the first time with my wife inside she immediately thought I'd been hoodwinked into buying a gas engine! Had to get out and put her ear up to the fender...

[Jeramy Schwartz]

8th # of the vin#. If its a 1=LB7 2=LLY

[gmmerlin]

The 2006 LLY and LBZ are the same engine.
The DMAX in 06 underwent some major changes.
The ONLY difference between the 06 LLY and LBZ is the PCM calibration.
The LBZ cals give the engine 50 more HP and 45 ft/lbs of torque over the 06 LLY

[JohnC]

Originally posted by gmmerlin:
....The ONLY difference between the 06 LLY and LBZ is the PCM calibration....So I need a software upgrade!?