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2000-2014 Silverado HD & Sierra HD

The workhorses. Discussion for the 2500HD and 3500HD heavy-duty trucks. Covers the 2014 HD transition year.

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  1. 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.

    1.7k
    posts

14,430 topics in this forum

  1. Where Is The Turn/flasher Relay On An 03 2500? 1 2

    By Coachmenguy,
    • 27 replies
    • 155k views

  2. Some Fuel Economy Numbers On My 2009 2500hd 6.0l City, Towing, And Now 1 2

    By phillyturbosix,
    • 26 replies
    • 38.7k views

  3. Finally '09 6.0 Exhuast The Right Way 1 2

    By alaska511,
    • 26 replies
    • 10k views

  4. Better towing power for a 6.0L 1 2

    By demented,
    • 26 replies
    • 120.6k views

  5. Weird vibration from rear 1 2

    By mattymax,
    • 26 replies
    • 24.8k views

  6. Blinking Check Engine light 1 2

    By TedSJr,
    • 26 replies
    • 49.9k views

  7. Lifter tick... 1 2

    By sdeeter19555,
    • 26 replies
    • 26k views

  8. Sierra Denali 6.0 1 2

    By rtm038,
    • 26 replies
    • 6.2k views

  9. P0300 Random/multiple misfire 1 2

    By troverman,
    • 26 replies
    • 62.2k views

  10. Transmission Cooler 1 2

    By springfield,
    • 26 replies
    • 16.2k views

  11. Cummins 6.7 to GM 6.0 1 2

    By mchasteen40,   
    • 26 replies
    • 15.4k views

  12. 45 Gallon Gas Tank Surprise 1 2

    By RoarinRow,
    • 25 replies
    • 5.3k views

  13. loss of power on incline 1 2

    By 06silverado5.3,
    • 25 replies
    • 2.5k views

  14. Considering getting a 8.1L 3500 1 2

    By Commander Damo,
    • 25 replies
    • 4k views

  15. Big step.. 1500 to 3500 advice 1 2

    By mastrcruse,
    • 25 replies
    • 3.1k views

  16. 2006 2500HD brake pads 1 2

    By Steve-Maine,
    • 25 replies
    • 3k views

  17. New ride!! 1 2

    By rusty01,   
    • 25 replies
    • 5.3k views

  18. Will I regret the 4:10 rear 1 2

    By BogeyHD,
    • 25 replies
    • 5k views

  19. 06 Duramax 6 Speed Manual Shift Not Functioning 1 2

    By Wesley Brown,
    • 25 replies
    • 39.5k views

  20. Whats the best upgrade for the allison, When making over 450HP 1 2

    By yukon25008.1,
    • 25 replies
    • 4.6k views

  21. ABS, traction control, and Stabilitrac MIL 1 2

    By sdeeter19555,
    • 25 replies
    • 3.4k views

  22. Gasser with 400+ lb/ft 1 2

    By tyhuck,
    • 25 replies
    • 3.6k views

  23. No Radiator Drain, So What's The Best Technique To Drain It? 1 2

    By Coasty,
    • 25 replies
    • 86.6k views

  24. Battery Drain? Help Needed! 1 2

    By Butler,   
    • 24 replies
    • 167.8k views

  25. 2011 2500hd - Violent Front End Shake 1 2

    By bobtomaszewski,
    • 24 replies
    • 37.5k views
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