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Duramax Diesel & 8.1L Big Block

The torque monsters. Tech for the LB7, LLY, LBZ, LMM, LML Duramax engines and the 8.1L Vortec (L18). Covers the Allison 1000 transmission.

584 topics in this forum

  1. Parts ID Please.

    By SeniorTIKI,
    • 2 replies
    • 416 views

  2. 2006 GMC 2500HD Hitching hot wire to center terminal in trailer wiring connecter

    By Steve-Maine,
    • 1 reply
    • 678 views

  3. Issue 2003 Gmc Sierra 2500hd 4x4 6 inch Cognito lift issues

    By Marshall Pay,   
    • 0 replies
    • 458 views

  4. G80 locker 2004 2500hd

    By Catmanchris,
    • 2 replies
    • 666 views

  5. TPMS

    By drivers2214,
    • 1 reply
    • 1.1k views

  6. Transfer case encoder motor help

    By Paul Cords,
    • 1 reply
    • 818 views

  7. warning water in full filter light

    By Steve-Maine,
    • 0 replies
    • 726 views

  8. 4l80e locks rear tires

    By Tylor Ingalls,
    • 1 reply
    • 687 views

  9. 2003 Gmc Sierra 4x4 indicator lights

    By Marshall Pay,
    • 0 replies
    • 624 views

  10. 06 Dura Max oil pan

    By Steve-Maine,
    • 0 replies
    • 774 views

  11. Airbag sensor location

    By mrzj188,
    • 2 replies
    • 1.1k views

  12. Ruthenium plugs part numbers

    By Leo Opalewski,
    • 1 reply
    • 1.5k views

  13. Adventures in Bearing Replacement

    By brainpause,
    • 2 replies
    • 1.4k views

  14. 2002 2500hd Radio Replacement

    By James Colgrave,
    • 3 replies
    • 2.5k views

  15. 4l80e on 2500hd Transmission keep on Overheating

    By Carlos2500,
    • 1 reply
    • 2.7k views

  16. Replacing diesel fuel lines on 06 250HD

    By Steve-Maine,
    • 2 replies
    • 3.6k views

  17. Bed interchange

    By Czman71,
    • 1 reply
    • 1.8k views

  18. 2003 Gmc Sierra 2500hd 6.0L 9.6 mpg slight stutter at idle

    By Marshall Pay,
    • 2 replies
    • 2.8k views

  19. GM 20970876 Parking Brake Control Module Assembly Obsolescence

    By bsjunkin,
    • 4 replies
    • 4.8k views

  20. Chev

    By Jabez chaulk,
    • 0 replies
    • 2.1k views

  21. Heat & defrost issues

    By millerspencer,
    • 2 replies
    • 2.3k views

  22. Slow speed braking vibration

    By Joseph Dutton,
    • 0 replies
    • 2.6k views

  23. Pinion angle LB7 Duramax

    By Craig650,
    • 1 reply
    • 2.8k views

  24. 2011 LML p003a code

    By papy,
    • 2 replies
    • 7.6k views

  25. Coolant leak

    By David Haviland,   
    • 3 replies
    • 4.3k views

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