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6.5L Diesel Engine

Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum
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Duramax First Generation: 2001-2004 (LB7)

Discuss the first generation (2001-2004 LB7) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.
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Closed / Archived Marketplace Ads

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Duramax Second Generation: 2004.5-2005 (LLY)

Discuss the second generation (2004.5-2005 LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion belongs in Third Generation forum due to the differences of the 2006 LLY and the 2004.5-2005 LLY. Engine related discussion ONLY.
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6.2L Diesel Engine

Discuss the 6.2 GM diesel engine & associated components.
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Trending Discussions All Trending Discussions →
  1. Free wiring diagrams!

    Electrical
    if anyone needs wiring diagrams pm me i have access to almost anything. thx
  2. New EVO Update!

    Third Generation Duramax Electronics/Tuners
    There is a new LBZ Evolution update. Firmware version 2.50.2943. Calibration version 1.17.2947. This will include the new MainOS support, new tuning, and another power level. Level 1 = Economy (should have improved), level 2 = Towing, level 3 = Performance, level 4 = Extreme. EGTs should...
  3. Info: Proper way to check balance rates

    Duramax First Generation: 2001-2004 (LB7)
    Proper way to check balance rates.... applies to all 2001-2010 DURAMAX's, LML's are as of yet unknown to this testing. It drives me nuts to hear people say there balance rates are good, so how can they have bad injectors? Well they might THINK there balance rates are good, but in reality they...
  4. DIY: 2500/3500 Van IFS 4WD Conversion

    Vans
    Van front crossmember & suspension - stock vs Quigley 4WD Stock front bolt-on crossmember (front view): Quigley 4WD front bolt-on crossmember: Stock front bolt-on crossmember (rear view): Quigley 4WD front bolt-on crossmember (rear view):
  5. Info: Former Allison Fluids Engineer (Here to Help)

    Allison OEM
    Hi folks, My name is Tom Johnson. I was the former Transmission Fluids Engineer for Allison Transmission from 1990 until my retirement in 2009. I worked to develop and release TranSynd for Allison over a 10 year period and I also wrote the Allison TES-295 and TES-389 specifications. I had...
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