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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.

    5.5k
    posts

1,787 topics in this forum

  1. 2020 GMC 3500HD & 5th Wheel Trailer LED Tail Light Flash

    By hawgwild,
    • 2 replies
    • 1.1k views

  2. Scare me away or have me forever

    By Wayne Carter,
    • 2 replies
    • 904 views

  3. Oil 1 2 3 4

    By 07Serria,
    • 58 replies
    • 47.5k views

  4. 3500HD AT4 gas owners?

    By Rory Blaze,
    • 1 reply
    • 624 views

  5. I'll probably be testing the Duramax longevity.

    By Irish80,
    • 3 replies
    • 1.2k views

  6. 2020 GMC 3500 HD

    By Philly2020,
    • 2 replies
    • 944 views

  7. fuel mileage 1 2 3

    By Bnsfengineer2014,
    • 36 replies
    • 9k views

  8. 2020 GMC Sierra Denali 3500HD Trailer TPMS Part Number

    By hawgwild,
    • 4 replies
    • 2.9k views

  9. First test drive

    By greatmizzou,
    • 6 replies
    • 1.2k views

  10. Rear View Mirror Camera

    By LV2500HD,
    • 7 replies
    • 7k views

  11. GMC vs Chevrolet Pricing

    By bullet225ho,
    • 7 replies
    • 2.1k views

  12. 2500HD gas drops 4.10 gear option! what! dealbreaker!

    By markp210,
    • 13 replies
    • 29.1k views

  13. Tailgate speakers

    By Shawn T,
    • 1 reply
    • 1.3k views

  14. Silverado HD vs Sierra HD - Ultimate Vote Off! 1 2 3 4

    By Zane,
    • 45 replies
    • 9.4k views

  15. Nox sensor

    By Christi,
    • 4 replies
    • 7.7k views

  16. Recall and Engine Light

    By Chrisw253,
    • 9 replies
    • 12.8k views

  17. Watch your dealer service department, they have joy riders among them. 1 2

    By KC Desert,
    • 20 replies
    • 2.4k views

  18. 2020 owners w/ HUD

    By KC Desert,
    • 4 replies
    • 1.9k views

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

    By GMC AT4,
    • 10 replies
    • 3.2k views

  20. Payload

    By mbsfgts,
    • 7 replies
    • 1.4k views

  21. Diesel without options or gas with all the options 1 2 3

    By Pastusak.t,
    • 33 replies
    • 4.4k views

  22. Ordered 2020 HD 1 2 3 4 5

    By cattledog04,
    • 64 replies
    • 11.4k views

  23. Rear HVAC Vents Weak?

    By Basketcase,
    • 6 replies
    • 27k views

  24. Tow mirrors

    By BigWhiteMastadon,
    • 7 replies
    • 1.8k views

  25. Trading in the Custom HD for SLE HD...

    By Weatherby460,
    • 5 replies
    • 1.3k views
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