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Good and Bad 2005 duramax??

Discuss Good and Bad 2005 duramax?? in the GENERAL DISCUSSION FORUMS forums; my 03 long box crew was the best great milage no problems other than tires till it caught fire and ...


  1. #11
    Member maxedcat650h1's Avatar
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    Re: Good and Bad 2005 duramax??

    my 03 long box crew was the best great milage no problems other than tires till it caught fire and now ive got a 08 long box crew 3500 sw still new 40kms good truck so far



  2. #12
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    Re: Good and Bad 2005 duramax??

    Quote Originally Posted by Summitric View Post
    Like all the earlier 6.6l td.... They have injector issues.... I think they are warrantied to 250k?? We've done a few of these in the last month. Dealership wanted $9800 from the guy and we were a little over $5000 to do all 8 injectors....
    I could be wrong but I was led to believe

    The LLY does not have injector issues. They are not warrantied to 250k.
    They are warrantied for 3 years and or 150k.

    The common problem on them is the 2 and 7 injector harness.

    Check out Diesel Place.com for more info.

    You can eliminate many injector issues by using clean fuel, use a pre OEM fuel filter as well, and diesel conditioner.

    And I love my o5 lly

    Cheers
    Chris

  3. #13
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    Re: Good and Bad 2005 duramax??

    Quote Originally Posted by Thunderr View Post
    I could be wrong but I was led to believe

    The LLY does not have injector issues. They are not warrantied to 250k.
    They are warrantied for 3 years and or 150k.

    The common problem on them is the 2 and 7 injector harness.

    Check out Diesel Place.com for more info.

    You can eliminate many injector issues by using clean fuel, use a pre OEM fuel filter as well, and diesel conditioner.

    And I love my o5 lly

    Cheers
    Chris
    your partialy wrong there is a special policy but only if it is because of high fuel return rates and the harnesses are what i usually see it's a split bank sys it will drop 2 cyls on each bank and yes the best thing you can do it add a pre-filter

  4. #14
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    Re: Good and Bad 2005 duramax??

    The LLY has NO issues at all the duramax engine that had injector problems was the LBZ. The LLY is a very good and dependable engine

  5. #15
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    Re: Good and Bad 2005 duramax??

    the LLY has injector issues i'm a gm dealer and have seen the lly's that have come back with injector issues my 05 went through 2 sets within 350,000 km's! They also have had issues with the head gaskets sometimes. the lly is different from the lbz and the lbz is different from lmm due to the injector size and pulse width. the lly is a great engine no queestions asked but you may wanna get ready for injectors on that truck if they havent gone already. mine went 125,000 km's and then again at just over 300,000. the lbz is a strong motor forsure by far one of the best but there is a reason why more people pull parts off the 01-04 LB7 motor just saying it is a little hidden gem that tons of people overlook but most egr delete pieces i.e.- the exhaust manifolds,up pipes, and down pipes are a lot of times a slightly modified lb7 part.
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  6. #16
    Member ram4tow's Avatar
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    Re: Good and Bad 2005 duramax??

    I have a 05 LLY

    1. Injector harness rub on alternator - easy fix look to see if any wires are damaged, repair and then cover the area where it goes over the alternator with hose or something of that nature.
    2. Injector harness #2 and #7 harness was too short from factory putting strain on these plugs. eventually causing them to lose contact with actual injector easy fix, take a pic and remove the harness clip at the injector and bend the inner tab (female end) so that the clip gains more contact with the injector. or by the lenthened injector harness from gm.
    ( You will know you have this go wrong because the truck will sound like a 4BT cummins ) dont as me how i know

    3.Head gaskets - pour the power to the lly and these will be a weak point, although some have had issues stock. arp studs and new gaskets will hold. 2005 seen a updated gasket
    4.Overheating - some people have issues with them over heating pulling a big fifth wheel, some fix it with LBZ rad, intake + pieces.
    5. transfer case pump rub - google it - easy fix.

    6. FPRV - put the power to it you will pop this, install a shim kit to solve this. VERY EASY

    **if your smart about your fuel filter changing regularly you SHOULD not have any injector issues you can also add an additonal filter with lift pump aka airdog, fass etc**
    a simple test with a buddy with EFI live or some other tuner that measures injector balance rates will quickly tell you if there are issues. i believe -4 mm3 to +4mm3 some say +6 as well.. is within spec at idle in drive.

    not all LLY's will have these issues this is just a compiled version.

    Check DIESELPLACE.com for a very indepth look into all you need to know about duramaxes
    Last edited by ram4tow; February 25th, 2012 at 02:54 PM.

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  7. #17
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    Re: Good and Bad 2005 duramax??

    My 04.5 LLY has 394k and change on it with all original injectors and no head gasket issues. (knock on wood) changed 2 H2O pumps thus far BUT thats all its had done to date. OH and is in need of some glow plugs as of last mth Chevy and GMC Duramax Forum

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    Last edited by GYMBRAT; February 25th, 2012 at 11:05 AM.
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  8. #18
    Member ram4tow's Avatar
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    Re: Good and Bad 2005 duramax??

    Quote Originally Posted by Duramax 93 View Post
    The LLY has NO issues at all the duramax engine that had injector problems was the LBZ. The LLY is a very good and dependable engine
    your thinking the LB7.... 01-04 lb7 04.5 - some early 06's LLY 06-07 lbz 07.5 lmm etc etc


    Originally Posted by jaredszakacs
    the LLY has injector issues i'm a gm dealer and have seen the lly's that have come back with injector issues my 05 went through 2 sets within 350,000 km's! They also have had issues with the head gaskets sometimes. the lly is different from the lbz and the lbz is different from lmm due to the injector size and pulse width. the lly is a great engine no queestions asked but you may wanna get ready for injectors on that truck if they havent gone already. mine went 125,000 km's and then again at just over 300,000. the lbz is a strong motor forsure by far one of the best but there is a reason why more people pull parts off the 01-04 LB7 motor just saying it is a little hidden gem that tons of people overlook but most egr delete pieces i.e.- the exhaust manifolds,up pipes, and down pipes are a lot of times a slightly modified lb7 part.

    Arent the California LB7s the only one of those years with EGR's...
    Last edited by ram4tow; February 25th, 2012 at 03:10 PM.

    1999 CR 250
    2013 RZR S 800 Orange
    2008 XP 800 154.
    2014 XM SUMMIT 146 BLK

    2006 1500 Hemi laramie 4x4
    2010 RAM 3500 CTD
    2008 21 foot xtreme sport enclosed
    2008 marathon 7' deck



  9. #19
    Member ram4tow's Avatar
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    Re: Good and Bad 2005 duramax??

    Quote Originally Posted by jaredszakacs View Post
    the LLY has injector issues i'm a gm dealer and have seen the lly's that have come back with injector issues my 05 went through 2 sets within 350,000 km's! They also have had issues with the head gaskets sometimes. the lly is different from the lbz and the lbz is different from lmm due to the injector size and pulse width. the lly is a great engine no queestions asked but you may wanna get ready for injectors on that truck if they havent gone already. mine went 125,000 km's and then again at just over 300,000. the lbz is a strong motor forsure by far one of the best but there is a reason why more people pull parts off the 01-04 LB7 motor just saying it is a little hidden gem that tons of people overlook but most egr delete pieces i.e.- the exhaust manifolds,up pipes, and down pipes are a lot of times a slightly modified lb7 part.

    Arent the California LB7s the only one of those years with EGR's...

  10. #20
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    Re: Good and Bad 2005 duramax??

    No matter which one you get, make sure that you are using the tow-haul mode when you are towing, I didn't on my second one, don't really know why not, but I fried the baby Allison in it and the reconditioned replacement was $5200.00 installed.
    Higher...Steeper...Deeper...OOOPSY!!
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