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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. USB to 12 Volt Adapter 1 2

    By revrnd,
    • 16 replies
    • 6.3k views

  2. power folding mirrors 1 2

    By Dunn,
    • 16 replies
    • 60.5k views

  3. More problems with my 2020 GMC 3500 Duramax 1 2

    By Richard Helm,
    • 16 replies
    • 17.5k views

  4. Anyon have CERAMX applied to their truck? 1 2

    By BigBru,
    • 16 replies
    • 7.7k views

  5. Portable Air Compressor 1 2

    By marpel,
    • 15 replies
    • 9.6k views

  6. 2020 GMC 2500HD Denali Location of WiFi HOTSPOT router & antenna 1 2

    By skatville,
    • 15 replies
    • 11.5k views

  7. 24 Hours With a 2020 Silveado HD (T1) 1 2

    By newdude,   
    • 15 replies
    • 5.2k views

  8. 2021 Chevy 2500 Texas Edition vs All Star Edition???????? 1 2

    By Gabe Bunn,
    • 15 replies
    • 12.4k views

  9. Educate a potential convert 1 2

    By Hobienick,
    • 15 replies
    • 2.7k views

  10. Something disgusting happened to my HD today. 1 2

    By Pryme,
    • 15 replies
    • 2.9k views

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

    By Jettech1,
    • 15 replies
    • 3.1k views

  12. Education Discount 1 2

    By CaptainMorganNC,
    • 15 replies
    • 3.5k views

  13. Max spare tire size 1 2

    By kylant,
    • 15 replies
    • 19k views

  14. What oil does the dealer use? I don't think he knows... 1 2

    By gmatx,
    • 15 replies
    • 28.2k views

  15. New Member -- 2500HD WT Question 1 2

    By chevymanar,
    • 15 replies
    • 3.4k views

  16. Kissed a moose last night 1 2

    By Cheekster96,
    • 15 replies
    • 3k views

  17. Once and for all... is the 2020 2500 AT4 Lifted 2”?? 1 2

    By Arkangel,
    • 15 replies
    • 14.2k views

  18. "Minor technology enhancements" for 2021 1 2

    By bharris515,
    • 15 replies
    • 2.5k views

  19. Fifthwheel options 6'9" bed 1 2

    By Adam9066,
    • 15 replies
    • 19.7k views

  20. Navigation update 1 2

    By GMC4Zee,
    • 15 replies
    • 2.4k views

  21. Program for DIY diagnostic and maintenance 1 2

    By jeetS,
    • 15 replies
    • 1.2k views

  22. Top Speed of a 2022 2500HD Gasser 1 2

    By Jettech1,
    • 15 replies
    • 11.1k views

  23. Wax frame coat gotten any better? 1 2

    By nick112288,
    • 15 replies
    • 7.8k views

  24. Is a big lift kit worth it? 1 2

    By Lifesgood,
    • 15 replies
    • 3k views

  25. Gooseneck hitch w/ 2500 HD standard bed prep package 1 2

    By heywalt,
    • 15 replies
    • 23.7k views

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