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6.6L (LML/L5P) & 6.0L (L96/LC8) Tech

Technical discussion for the 2015-2016 Duramax 6.6L Turbo-Diesel V-8 (LML),  2017-2019 Duramax 6.6L Turbo-Diesel V-8 (L5P) and Vortec 6.0L V-8 (L96 / LC8) in the 2015-2019 Silverado HD and Sierra HD applications. Also includes, drivetrain, transmission, axles, differentials, and exhaust systems.

199 topics in this forum

  1. Factory Torque Specifications 2017 Silverado LTZ 3500 HD 6.6

    By JJS-2017-3500-DURAMAX,
    • 0 replies
    • 61 views

  3. 2015 6.6 Duramax Chevy 3500 HD

    By JerryM72,   
    • 0 replies
    • 154 views

  4. Fuel leak causing engine shutdown

    By Dernie,
    • 1 reply
    • 169 views

  5. 6.0 tune needed after exhaust mods ?

    By Jec8563,
    • 5 replies
    • 1,097 views

  6. 2015 6.0 Catalytic Converter

    By Viceroy267,
    • 1 reply
    • 476 views

  7. PCV reroute

    By Diver6,
    • 0 replies
    • 309 views

  8. Necessary minimum tire pressure

    By Ben Dover,   
    • 12 replies
    • 1,442 views

  9. Code P21DD (Reductant Tank Heater)

    By TinkeringFox,   
    • 3 replies
    • 63,063 views

  10. Low Oil in Diesel Engine 6.6L 1 2

    By AK_ Maverick-X3,
    • 18 replies
    • 1,536 views

  11. 2018 L5P codes. P129F & P228C

    By Danny R,
    • 6 replies
    • 1,518 views

  12. Fuel 1 2

    By Waaazooo,
    • 20 replies
    • 4,844 views

  13. 2015 6.0 Burned Spark Plugs

    By WiscoZ71,
    • 14 replies
    • 2,224 views

  14. 2018 L5P reduced power and cutting out

    By Danny R,   
    • 0 replies
    • 807 views

  15. 2018 L5P sudden loss of power and shut off

    By 480Ruger,   
    • 9 replies
    • 16,758 views

  16. Buying 2018 2500 Denali w 25K Miles - Question Re Z71

    By sgnden,
    • 1 reply
    • 575 views

  17. CP4 Fail, how many out there?

    By COHauler,   
    • 2 replies
    • 645 views

  18. 2016 GMC Sierra 2500HD Service Trailer Brake System/Check Trailer Connection

    By GMCNuneZ71,
    • 8 replies
    • 2,418 views

  19. 2019 2500 6.6 Duramax High Idle

    By Brad Carruthers,
    • 4 replies
    • 1,915 views

  20. Tech link article on regen

    By calgator73,
    • 0 replies
    • 527 views

  21. Diesel Particulate Filter Regeneration Frequency

    By tripleb,
    • 9 replies
    • 9,148 views

  22. WHat size is the Diesel fuel tank?

    By flyingfool,
    • 10 replies
    • 942 views

  23. 4l80e transmission swap to 2016 2500 Silverado

    By angel ullom,
    • 5 replies
    • 966 views

  24. Looking at a 2016 6.0, What to Worry About or Check? 1 2

    By edgexcsp,
    • 19 replies
    • 3,314 views

  25. L5p Fuel Tank hissing/air leak sound

    By DmaxBranman,
    • 0 replies
    • 777 views

  26. door lock problem

    By glenn hofer,
    • 0 replies
    • 304 views


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