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LLY vs LBZ ??

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  • LLY vs LBZ ??

    Looking at the DM and want the LBZ (360hp) but have found several LLY (310hp) too with the same options.

    I have heard the LLY is a detuned LBZ, and have heard they are diff motors all together? LLY was availible until late 05 and now everything is the LBZ.

    So does anyone really know the diff??

    THX

  • #2
    Re: LLY vs LBZ ??

    The 06 LLY and LBZ are the same motor just different tuning. All and only the 06s have a 6 speed ally, cooling mods, fan, shroud, ETC, 32 bit ECM, lower compression, stronger block, and pistons that is the just of it. You can tell the 2 apart by the 8th # in the vin it is a ā€œDā€ on the LBZ. The 05s and earlier LLYs and LB7s are different.
    Last edited by dozerboy; 07-18-2006, 10:15 PM.

    These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health.

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    • #3
      Re: LLY vs LBZ ??

      When did the LBZ come out? Does gm offer it as a more powerful motor compared to the LLY or is it a diff.(better) design also?
      -2003 GMC ECSB 2500HD 4x4 496 8.1L, Allsion, Volant CAI, Helix Power Tower, Granatelli MAF, Dual 3" w/ X-pipe no mufflers/no cats,3" PA BL, 8" Fabtech, Custom Steering with 3/4 Heims, 42 TSL SX IIs, 20x10 MT Classic IIs.

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      • #4
        Re: LLY vs LBZ ??

        Thanks DB, that is what I believed too.

        Quit a few sites out there with the info showing when the 2 were availible with the LBZ being the latest.

        Since I am going to tune it anyway, why not save a few $ and get more rebate too!

        FB

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        • #5
          Re: LLY vs LBZ ??

          Originally posted by ChevyMan02
          When did the LBZ come out? Does gm offer it as a more powerful motor compared to the LLY or is it a diff.(better) design also?
          Its all in my post in stock form the 06s are better. How did I forget the 06s also have a larger turbo too.
          Last edited by dozerboy; 07-19-2006, 07:43 PM.

          These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health.

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          • #6
            Re: LLY vs LBZ ??

            The 06 has a variable geometry turbocharger. :read: I suggest reading this page, it's always been an accurate, reliable independant source for diesel info.

            http://www.thedieselpage.com/duramax...ewsrelease.htm
            15 silverado CCSB Z71
            14 Tahoe

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            • #7
              Re: LLY vs LBZ ??

              Called Banks today and they said the LBZ and the LLY are diff motors. They can tune an LLY more, but the LBZ will still make more power.

              I had already read the above but they really dont say what the diff are between the 2.

              Hmmm, FB

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              • #8
                Re: LLY vs LBZ ??

                Originally posted by FBJR
                Called Banks today and they said the LBZ and the LLY are diff motors. They can tune an LLY more, but the LBZ will still make more power.

                I had already read the above but they really dont say what the diff are between the 2.

                Hmmm, FB
                That whole page is about the changes made to the duramax for the LBZ. Here's a page on the LLY.

                http://www.thedieselpage.com/duramax/lly2004.htm
                15 silverado CCSB Z71
                14 Tahoe

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                • #9
                  Re: LLY vs LBZ ??

                  Finally found something that answered my question. There are 2 LLY series motors. I want the 3 (LLY 06) or D (LBZ)

                  Engine Identification:
                  The Duramax engine has evolved from the original LB7 series to the LLY series, and now the LBZ series. The LB7 was used from 2001 model year until mid 2004 model year. In mid 2004 the LLY was released. In 2006 the Duramax changed again. The early 2006 engines were still called LLY and the alter 2006 became the LBZ. This creates some confusion as the 06 LLY is distinctively different from the 04.5-05 LLY. The 2006 LLY and LBZ engines are essentially the same when it comes to modifications. The simplest way to verify which series you have is the VIN# of the truck. The 8th digit is the engine ID and it will either be a 1, 2, 3, or D.

                  01-04 LB7 is a 1
                  04.5-05 LLY is a 2
                  06 LLY is a 3
                  06 LBZ is a D

                  Example: 1GCHK29143Exxxxxx for LB7 and 1GCHK29243Exxxxx for LLY. It is important to know this as while the engines are essentially the same at the core, the electronics, turbochargers, electronics, and injectors are different among the variants.

                  FB
                  Last edited by FBJR; 07-21-2006, 01:08 AM.

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                  • #10
                    Re: LLY vs LBZ ??

                    Ah, I thought you just wanted to know the differences between the LLY and LBZ :crazy:
                    15 silverado CCSB Z71
                    14 Tahoe

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                    • #11
                      Re: LLY vs LBZ ??

                      I knew the basics but wanted to know how to tell them apart when buying too.

                      LBZ for sure now!

                      FB
                      Last edited by FBJR; 07-21-2006, 01:54 PM.

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                      • #12
                        Re: LLY vs LBZ ??

                        Like I said the 06 LLY and LBZ are the same just different tuning and the other LLYs are different. The easiest way to tell the LBZ apart is the badges the LLY has the same old Duramax Diesel badge and the LBZ has a Duramax Allison badge. You still need to check the VIN as a lot of guys are sticking on the new badges on there none LBZs.

                        These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health.

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                        • #13
                          Re: LLY vs LBZ ??

                          I was looking at a new 06 with a "2" vin meaning an older LLY.

                          FB

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                          • #14
                            Re: LLY vs LBZ ??

                            So whats the dif between the 01 and 06. My dad has the 01, it was the first one in the DFW area. how tunable is it, cause itll probly be my college vehicle.
                            87 Chevy R10, 355 TBI, 700R4, Dual 2.5" with thrush glass packs dumped at the axle, Hedman long tubes, TB spacer, open element cleaner, 3.73 open rear end(single skid of doom!)

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                            • #15
                              Re: LLY vs LBZ ??

                              Originally posted by Superpug
                              So whats the dif between the 01 and 06. My dad has the 01, it was the first one in the DFW area. how tunable is it, cause itll probly be my college vehicle.
                              They're all good, and there's not much limit on what you can do to any of them, although availability of aftermarket stuff on the 06 trucks is slightly limited as a lot of the tuning companies are still decoding them, but there's still tons out for even that.
                              Drive it like I stole it? Why slow down? :flipoff:

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