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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. Curb Weight of 2021 Black Diamond

    By Austinamp,
    • 2 replies
    • 1.5k views

  2. Considering new High Country...questions!

    By Maize & Blue,
    • 8 replies
    • 1.5k views

  3. I’m happy to announce

    By Pryme,
    • 7 replies
    • 1.5k views

  4. Build a custom sle or buy slt

    By OmahaBen,
    • 13 replies
    • 1.5k views

  5. should i change?

    By crazydog,
    • 10 replies
    • 1.5k views

  6. Focus groups loved the Silverado HD

    By DTB,
    • 9 replies
    • 1.5k views

  7. 3500 2024 dually Denali ultimate early review

    By Mike Weinandy,
    • 0 replies
    • 1.5k views

  8. What is normal transmission temps?

    By Teezee3500,
    • 3 replies
    • 1.5k views

  9. Switched brands

    By XY74,
    • 11 replies
    • 1.5k views

  10. 2500 HD VS 3500 HD

    By BCGM,
    • 5 replies
    • 1.5k views

  11. Traded in 1500 for 2500

    By Jagerschnapps1,
    • 4 replies
    • 1.5k views

  12. Finally!!!!!!

    By rongotti,
    • 6 replies
    • 1.5k views

  13. Color

    By razorwired,
    • 8 replies
    • 1.5k views

  14. Trade High Country for ZR2? 1 2

    By gregus73,
    • 29 replies
    • 1.5k views

  15. Rear Slider Leak AND broken tow mirror. Need help :)

    By D A,
    • 2 replies
    • 1.5k views

  16. 2020 Gasser vacuum(sucking) sound in dash drivers side

    By Bones454,
    • 2 replies
    • 1.5k views

  17. why are the 3500hd reg cab work trucks impossible to find

    By 94yj,
    • 3 replies
    • 1.5k views

  18. Tow Mirrors

    By Capt Call,
    • 6 replies
    • 1.5k views

  19. 2023 3500 Tow Mirror Part Number

    By RobT61,
    • 4 replies
    • 1.5k views

  20. 2020 is 10k more than 2019 denali

    By Pastusak.t,
    • 3 replies
    • 1.5k views

  21. Cruise control questions

    By skav,
    • 4 replies
    • 1.5k views

  22. any oil bypass systems for our trucks yet? Diesel

    By JCunningham,
    • 2 replies
    • 1.5k views

  23. Paint chipped

    By Andrew Benner,
    • 5 replies
    • 1.5k views

  24. Is A New Truck Possible?

    By Vanlieremead,
    • 4 replies
    • 1.5k views

  25. Extending Mirrors in Folded Position?

    By Debug,
    • 6 replies
    • 1.5k views
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