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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.

    8.8k
    posts

  2. Modifications & Accessories

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

    11k
    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

1,791 topics in this forum

  1. Auxiliary Accessory Trailer Camera 1 2 3 4 12

    By Scott Perkins,
    • 169 replies
    • 145.1k views

  2. P0300 on 2020 Sierra 5.3

    By Chief Paw Paw,
    • 2 replies
    • 3k views

  3. How soon to get a 2024 HD Crew Cab Long Box 3500 Gasser LT 1 2

    By skorpyd,
    • 20 replies
    • 4.5k views

  4. 2022 2500 multi position tailgate removal

    By Terry Parkin,
    • 5 replies
    • 14.4k views

  5. Order Update Frequency

    By Tatertoter,
    • 2 replies
    • 1.2k views

  6. Interior Color

    By marpel,
    • 2 replies
    • 1.2k views

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

    By Jettech1,
    • 15 replies
    • 3.2k views

  8. Loose Steering Concern.

    By 2021GMCLP5,
    • 3 replies
    • 15.2k views

  9. New here, 2020 6.6 gas ditched the diesel 1 2

    By lsttype,
    • 22 replies
    • 3.6k views

  10. I have an abstract mind and love to think out of the box....so lets say!! 1 2

    By Jettech1,
    • 28 replies
    • 2.5k views

  11. 2024 / Downpour Metallic (gxp)

    By jjackkrash,
    • 9 replies
    • 13.5k views

  12. If y'all want a laugh this Friday night

    By NaturallyAspirated,
    • 9 replies
    • 1.5k views

  13. Let’s discuss Rust! 1 2 3

    By Pryme,
    • 41 replies
    • 20.9k views

  14. 2020 GMC 2500HD Denali Location of WiFi HOTSPOT router & antenna 1 2

    By skatville,
    • 15 replies
    • 11.8k views

  15. 2023 Silverado 2500HD Custom - Trailer Brake Controller

    By lmullenaux,
    • 5 replies
    • 7.5k views

  16. Am I the only one infatuated with the new GM infotainment center?

    By Jettech1,
    • 10 replies
    • 1.7k views

  17. 2020 GMC AT4 Rear Leaf Spring Slap or Clunk Noise 1 2

    By ploughboy,
    • 15 replies
    • 11.5k views

  18. 2021 GMC Sierra HD - Oil Type?

    By 2021GMCLP5,
    • 7 replies
    • 5.3k views

  19. Soft paint....

    By shadow gray 2020 hd,
    • 8 replies
    • 4.1k views

  20. Help deciding which hitch mount. What do you guys run? 1 2 3

    By Pryme,
    • 43 replies
    • 6.1k views

  21. opinions on waitng time at the dealer for warranty repairs

    By 94yj,
    • 5 replies
    • 1.1k views

  22. '24 GMC Sierra build is live

    By gemarsh,
    • 9 replies
    • 3.1k views

  23. 2023 rear seat bottom removal

    By wurgs,
    • 9 replies
    • 42.8k views

  24. The 2021 Stripped C&C may be made this year

    By 2021 HD,
    • 3 replies
    • 853 views

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

    By Jettech1,
    • 15 replies
    • 11.4k views

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