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2020-2026 Silverado HD & Sierra HD

The heavy-duty headquarters. Discussion for the 2500HD and 3500HD. Towing, payload, ordering, and daily driving.

 

 

Subforums

  1. Troubleshooting, Warranty & Recalls

    The repair shop. Diagnose emissions codes, electrical issues, Allison transmission behavior, and recall updates.

    8.7k
    posts

  2. Modifications & Accessories

    Bumper replacements, 5th wheel hitches, auxiliary lighting, and suspension upgrades for your workhorse.

    10.9k
    posts

  3. 6.6L Duramax Diesel (L5P)

    The torque monster. Tuning, maintenance, and exhaust discussion for the L5P Duramax and 10-speed Allison transmission.

    2.2k
    posts

  4. 6.6L Gas V8 (L8T)

    The iron-block workhorse. Tech and reliability discussion for the 6.6L L8T V8 and the 6-speed / 10-speed heavy-duty transmissions.

    5.6k
    posts

1,787 topics in this forum

  1. 10 speed vs 6 speed Difference

    By James Beyer,
    • 6 replies
    • 33.5k views

  2. 2022 Silverado 3500 brake problems

    By Chris Goins,
    • 2 replies
    • 4.1k views

  3. Aux Battery Recall

    By rjgvt,
    • 8 replies
    • 5.4k views

  4. 2500 HD VS 3500 HD

    By BCGM,
    • 5 replies
    • 1.5k views

  5. 3500 2024 dually Denali ultimate early review

    By Mike Weinandy,
    • 0 replies
    • 1.5k views

  6. GMC App Frozen - 2024

    By Crazy Canuck,
    • 3 replies
    • 2.5k views

  7. forced to disable my ad blocker to access this site 1 2

    By vucelick,
    • 15 replies
    • 1.8k views

  8. Frame Wax Coating Issues. Again........

    By C/K Man,
    • 5 replies
    • 3.2k views

  9. Climate Control

    By marpel,
    • 7 replies
    • 8.2k views

  10. How many grease fittIngs

    By Hoginedgewood,
    • 1 reply
    • 2.4k views

  11. Weak Break Controller

    By dppatterson7,
    • 2 replies
    • 2k views

  12. Grill guard 2500 HD Crew cab- Westin

    By Trey Eckert,
    • 3 replies
    • 2.1k views

  13. 22 2500hd clunk over bumps in front end

    By 22 6.6gasser,
    • 0 replies
    • 869 views

  14. 7 Pin trailer connection issue

    By Londart2020,
    • 13 replies
    • 17.8k views

  15. oem wheels with larger tire pic request

    By Sonders,
    • 12 replies
    • 40.2k views

  16. Cat Scale

    By rjgvt,
    • 5 replies
    • 3.3k views

  17. 2500HD vs 3500HD 1 2

    By Jason Hewitt,
    • 19 replies
    • 4.6k views

  18. I haven't been around much lately.... how ta hell are you doing? 1 2

    By Jettech1,
    • 16 replies
    • 1.7k views

  19. Trailer plug spring loaded cover

    By DbMaddog,
    • 1 reply
    • 946 views

  20. Winter driving 1 2

    By gregus73,
    • 18 replies
    • 8.2k views

  21. Bed Mat

    By marpel,
    • 8 replies
    • 5.2k views

  22. Off road bumper and winch install

    By john lawrence,
    • 6 replies
    • 5.1k views

  23. 2022 GMC Sierra 3500HD fuse box

    By Sachinb,
    • 14 replies
    • 45.7k views

  24. 2025 HD Trail Boss

    By Bloody Marty,
    • 9 replies
    • 9.7k views

  25. Advertising

    By arundelglass,
    • 12 replies
    • 1.1k views
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