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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.

    1.8k
    posts

14,431 topics in this forum

  1. Voltage meter trouble

    By Carl12117,
    • 4 replies
    • 903 views

  2. 6l90E transmission cooler line change

    By tankdog,
    • 0 replies
    • 1k views

  3. SWAP OUT 2005 HD GAS 6.0

    By Aurelio Aranda,
    • 1 reply
    • 786 views

  4. 2012 GMC 2500HD differential upgraded needed

    By GMC Bill,
    • 4 replies
    • 1k views

  5. 4l80e shift issue - FIXED!

    By spiGini,
    • 4 replies
    • 16.8k views

  6. Hard Shifting 4L80E

    By charp1824,
    • 1 reply
    • 1.5k views

  7. Grinding/Buzzing noise under truck?

    By docholiday17,
    • 1 reply
    • 2k views

  8. 4x4 help please

    By Chevygirl03,
    • 2 replies
    • 730 views

  9. Swapping front doors on 2011 Silverado 3500HD

    By CRUZ55,
    • 0 replies
    • 703 views

  10. NP 261 Rebuild

    By Raptordude,
    • 6 replies
    • 14.3k views

  11. Water on drivers floor board

    By bones30,
    • 7 replies
    • 6.3k views

  12. Transmission Problem

    By gdeaton48,
    • 0 replies
    • 691 views

  13. 06 to 07

    By Trevor McKenzie,
    • 6 replies
    • 1.2k views

  14. Transmission type for 2500 HD 4x4 8.1 gas

    By Denis S,   
    • 6 replies
    • 19.2k views

  15. 06 Silverado Air Temperature Sensor

    By dj_bosse,
    • 1 reply
    • 1.9k views

  16. Digital dual climate controls hvac frozen

    By Riku,   
    • 1 reply
    • 959 views

  17. Ly6 to l96 swap running rich

    By Reid Krabill,
    • 6 replies
    • 7.7k views

  18. Silverado Issues

    By Gary Kitelinger,
    • 1 reply
    • 708 views

  19. OBD II Doesn't Work

    By n4hmr,
    • 8 replies
    • 66k views

  20. 02 silverado 2500hd help

    By Edward spencer Jr,
    • 4 replies
    • 1.2k views

  21. Side Tow Mirror Lock in Bad Angles

    By Richard Vars,
    • 1 reply
    • 2.8k views

  22. 2021 Clearance lights retro fit to 2011

    By pepsijgf24,
    • 1 reply
    • 774 views

  23. What do i try next

    By vettechjamie,
    • 1 reply
    • 661 views

  24. 4L80E Only reverse.

    By konstantinNeo,
    • 1 reply
    • 743 views

  25. Adding keyless entry 2006 2500 Silverado

    By wade_660,
    • 5 replies
    • 10k views
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