Results 1 to 7 of 7

Thread: LLY or LBZ Motor ?

  1. #1
    Join Date
    Nov 2004
    Location
    Australia
    Posts
    22

    Default LLY or LBZ Motor ?

    Hi folks,
    I need help on identifying my engine i bought for my conversion. I have a motor with the heater in the intake (LLY/LBZ) but do not know which motor it is. I want to get some workshop manuals but because i dont have the original truck i am not quite sure what the VIN number is? Can i find out from the engine number or is it on the engine computer? I believe i can get the VIN number out if i plugged in EFI live straight into the engine computer but i want to get the manuals first so i can start my project without hooking wrong wiring up and frying cables!!!!!!!!! Being located in Australia makes hard to get local help so hence being a member of the Diesel Pages. I have requested help in the Conversion pages but no response so i will try here and see if someone can help me. Thanks in advance folks.

    Cheers Garry.
    1988 Range Rover 6.2L Chev diesel.
    2001 Land Rover Discovery TD5.
    1997 Land Rover Defender 130 single cab TDI300 set up for the outback.
    2001 Land Rover Defender 130 Twin cab about to be Duramaxed!!

  2. #2
    Join Date
    Mar 2007
    Location
    Pacific Northwest
    Posts
    740

    Smile

    A quick glance through GM SI shows no real difference in the service manual. All the repairs/ diagnosis is for the LLY and the LBZ together. Remember the major difference is more horse power and torque between the two engines. In other words, if you buy the 2006 GMC/ Chevrolet manuals the diagnosis should be the same.
    1998 Chevy k-2500 454 147,000 miles and climbing!

    1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!

  3. #3
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,738

    Arrow

    Pulling the VIN would be an excellent idea, for a couple reasons. The 8th digit will indicate the engine series. 2 for LLY and D for LBZ. Also, you can have one of our on board GM techs run the VIN for a service history of the engine. At the same time, I find no physical difference between the 2006 LLY and LBZ, programming only. This is visual only. I haven't been inside one, yet, but have no reason to believe they are different internally.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  4. #4
    Join Date
    Mar 2007
    Location
    Pacific Northwest
    Posts
    740

    Default

    I just checked with the parts guy on the following items................. the turbo, injectors, injection pump, waterpump, and the EGR valve are all the same LBZ vs. LLY.


    The heads, pistons and crankshaft too.
    1998 Chevy k-2500 454 147,000 miles and climbing!

    1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!

  5. #5

    Default

    Either way, you are in good shape.

    My '06 LLY pulls noticably stronger than the early '05 LLY I previously owned. Not sure why...maybe someone can enlighten me on this one. Thought maybe it was in my head, until my other driver noticed the same thing, and the mileage is much better.

    Best of luck to you!
    2011 Chevrolet Tahoe 5.3L daily driver
    • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
    • Total GM diesel miles to date : ~950K

  6. #6
    Join Date
    Jul 2007
    Location
    Canada
    Posts
    63

    Default

    There are differences between early and late build LLY engines. The late build LLY's are essentially the same as the LBZ. If your intake heater screws into the top of the intake it's an early LLY. If you have the grid style heater that bolts to the front of the intake it's a late build LLY/LBZ.

  7. #7
    Join Date
    Nov 2004
    Location
    Australia
    Posts
    22

    Default LLY or LBZ

    Sorry about no relying earlier to you guys but i have just got back from watching the car racing. Darn Fo%ds won.Thanks guys for your replies!!!! My engine has the grid style heater in the intake, so late LLY or LBZ. I will order a 2006 manual so i can get my build started. Can not wait to hear engine running.

    Duramaster - Good to know that only programming different to LLY / LBZ

    DmaxMaverick - Who do i send my engine number to so they can tell me VIN number and vehicle information?

    Thanks again folks for your help and comments

    Garry.
    1988 Range Rover 6.2L Chev diesel.
    2001 Land Rover Discovery TD5.
    1997 Land Rover Defender 130 single cab TDI300 set up for the outback.
    2001 Land Rover Defender 130 Twin cab about to be Duramaxed!!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •