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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

1,789 topics in this forum

  1. 2022 rusted drivetrain components

    By Sonders,
    • 11 replies
    • 3.3k views

  2. 2024 Sierra GMC Denali "super cruise"

    By Hobuck2000,
    • 3 replies
    • 3.3k views

  3. This is one of the many reasons we buy our HD trucks 1 2

    By Jettech1,
    • 21 replies
    • 3.2k views

  4. A little photoshop

    By DTB,
    • 1 reply
    • 3.2k views

  5. 2500HD Tow Capability Question

    By WinterSpringsSierra,   
    • 5 replies
    • 3.2k views

  6. Silverado 5500HD Integrated Trailer Brake Module Location?

    By 08lt17,
    • 1 reply
    • 3.2k views

  7. Frame Wax Coating Issues. Again........

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

  8. 2022 Denali ordered.....now the wait begins

    By ~Wicked~,
    • 10 replies
    • 3.2k views

  9. Ordered: 2020 2500HD Denali Ultimate

    By Shawn T,
    • 7 replies
    • 3.2k views

  10. has anyone heard about there being a constraint on the gas engine?? 1 2

    By BBE,
    • 16 replies
    • 3.2k views

  11. Be careful of your block heater

    By rforten,
    • 14 replies
    • 3.2k views

  12. Multipro Tailgate Use With Forklift?

    By Haoleguy,
    • 11 replies
    • 3.2k views

  13. 2022 2500HD LT DIC audio menu

    By TonyTan,
    • 7 replies
    • 3.2k views

  14. Will my 2013 HD wheels (studs) bolt up to my 2020 HD?

    By GMC AT4,
    • 10 replies
    • 3.2k views

  15. MultiPro / aka Multi-Weak-Point Tailgate

    By Tomato,
    • 2 replies
    • 3.2k views

  16. 2022 Silv/Sier HD ordering information posted (USA)

    By KCJackson1,
    • 5 replies
    • 3.1k views

  17. 2020 Dually Production start date -- anyone know? 1 2

    By Sask Farmboy,
    • 17 replies
    • 3.1k views

  18. Thoughts on new HD Twins 1 2

    By wesd,
    • 15 replies
    • 3.1k views

  19. trailer tire tpms range

    By BobW38,
    • 2 replies
    • 3.1k views

  20. Rumor Has It 1 2

    By littleal,
    • 19 replies
    • 3.1k views

  21. 2020 Sierra HD wheelwell lights

    By KCJackson1,   
    • 2 replies
    • 3.1k views

  22. 2024 gmc 2500hd 6.6 gas intermittent p0458 Evap Control Valve "A" Circuit Low

    By Ausslo,
    • 5 replies
    • 3.1k views

  23. Towing question

    By SuperDuper,
    • 10 replies
    • 3.1k views

  24. Inexpensive 5th wheel hitch that can be used with the 5th wheel prep package. 1 2

    By Jettech1,
    • 15 replies
    • 3.1k views

  25. How far out did the strike really push new builds? 1 2 3

    By BBE,
    • 31 replies
    • 3.1k views
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