Which are the best and/or worst Duramax years?

Discussion in '6.6L Duramax Diesel' started by 6 Nebraska IDIs, May 25, 2011.

  1. 6 Nebraska IDIs

    6 Nebraska IDIs Registered User

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    I've read a couple years ago that a few years of the duramax production were prone to being problematic. IIRC those years are 01, 02, 03 & 04 but correct me if I'm wrong. A friend at work is looking to buy a duramax and I just want to steer him clear of any of the years that are prone to having problems.

    I think he's looking at an '02 right now. Which IIRC is the worst of all 4 or the problematic years.
     
  2. wmoguy

    wmoguy Registered User

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    01-02 had injector issues, which still to this day are issues even after "redesigns"

    04.5-07s are generally the most favored models. IIRC its the 04-05's that have some issues with overheating on heavy loads. 06+ they have the 6 speed Allison

    I had an 2010 that was a total POS. I got rid of it with about 7k miles on the clock. New Turbo, New EGR, bunch of new electronics, and DPF replaced (all warranty of course, but still..) ALso the sheet metal on the new ones is paperthin
     
  3. mark7.3idi

    mark7.3idi Full Access Member

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    01-04 the lb7 r about the best they do have injector problems but u can fix that with good 10% ones now if u go newer they r better to a point like the lbz have head gasket problems the lmm is a goog motor just have to much egr bull crap it is just one of those thing picky things
     
  4. MJ Synthetics

    MJ Synthetics Site Sponsor

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    The very best years to own are the 06-07 LBZ (Classic Body). The 07.5 is the new LMM new body style and has the DPF on it which robs fuel mileage. The LBZ has the most hp and torque only a catalytic converter in thye exhaust system that is easily done away with. The least problems are with the LBZ models. The known issues are leaky transmission cooler lines in colder weather but we sell a kit to fix that for good. The 06 and above have the 6 speed Allison Trans which is the best towing transmission on the market.
     
  5. 91idi

    91idi Fiberglass Whore

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    Have 01-07 all are great trucksn
     
  6. superduty12v

    superduty12v Full Access Member

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    01-04.5 lb7 had injector issues, alot were replaced under warranty put the warranty to 200k. 04.5-07 lly had restrictive turbo mouthpieces, like to blow HG's and 06-07.5 were lbz's and lly's the only difference was the tune between the two, LBZ is the absolute best motor, just didnt have mahle pistons like the true LLY's and LBZ's, cant really handle above 550-600hp. the LML and LMM have DPF and DEF, dont know much else about em. handle horsepower well. i love my dmax, dont give me a problem.
     
  7. Paul

    Paul Dunce

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    Which are the best and/or worst Duramax years

    I know there are alot of aftermarket engine tuners for the duramax and different products you can get along with them. SO i know there is banks, edge, bullydog, hypertec, probably westers and what else...? My question is, which one is the best and why.
     
  8. FordGuy100

    FordGuy100 Registered User

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    None of those. EFI live with custom tunes. Custom tunes are better in almost every way. Better shifting, engine management, power, fuel mileage, etc.

    Stay away from "canned" tunes for any vehicle.
     
  9. 79jasper

    79jasper Chickenhawk

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    Times a million

    Sent from my SM-T537R4 using Tapatalk
     

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