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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. GM to recall hd's for tailgate dropping... 1 2 3 4 6

    By gemarsh,
    • 79 replies
    • 15.1k views

  2. Any new news on GM retiring the 6.Dinosaur ? 1 2 3 4 6

    By f8l vnm,
    • 79 replies
    • 19.8k views

  3. I have a question for you experienced long haul campers. 1 2 3 4 6

    By Jettech1,
    • 79 replies
    • 7.2k views

  4. 6.6L GAS for 2010HD? 1 2 3 4 6

    By redwngr,
    • 76 replies
    • 17k views

  5. i am looking for a new new to me truck and wanted to ask for opinions on the new 10 speeds transmissions that come on the 24 up trucks 1 2 3 4 6

    By 94yj,
    • 75 replies
    • 6.7k views

  6. Couple cool things and first 400 miles, impressionable thoughts of the 24' HD 1 2 3 4 5

    By Leonardo Willi,
    • 74 replies
    • 9.7k views

  7. 2500 HD - 10,650 lbs. GVWR? 1 2 3 4 5

    By tom18287,
    • 74 replies
    • 72.1k views

  8. Build times 1 2 3 4 5

    By Fdbdw,
    • 74 replies
    • 16.4k views

  9. Silverado HD revealed 1 2 3 4 5

    By Jollygreengiant,
    • 74 replies
    • 12.8k views

  10. Very large addition being added to Flint assembly. 1 2 3 4 5

    By 64BAwagon,
    • 73 replies
    • 9.7k views

  11. DELAYED....again 1 2 3 4 5

    By Cheekster96,
    • 72 replies
    • 12k views

  12. 6.2 owner ready to jump ship to 6.6 gasser 1 2 3 4 5

    By dieselfan1,
    • 71 replies
    • 7.6k views

  13. 2024 Silverado 2500 HD with the 6.6 Gas (L8T) Engine 1 2 3 4 5

    By ChrisG-2019,
    • 71 replies
    • 91.2k views

  14. How's the ordering/delivery going? Recently found out my 2022/2023/ is now going to be a 2024? and a rumor??? 1 2 3 4 5

    By Leonardo Willi,
    • 71 replies
    • 19.8k views

  15. Disappointed in towing performance 1 2 3 4 5

    By GearHead71,
    • 71 replies
    • 15.1k views

  16. 0 to 60 with the gasser and Allison combo 1 2 3 4 5

    By Jettech1,
    • 71 replies
    • 28.3k views

  17. If I wasn't so close to retirement.....I would buy this truck tomorrow! 1 2 3 4 5

    By Jettech1,
    • 70 replies
    • 6.6k views

  18. Tire Rotation 1 2 3 4 5

    By BCGM,
    • 69 replies
    • 14.9k views

  19. 2024 Silverado HD 1 2 3 4 5

    By C/K Man,
    • 69 replies
    • 18.9k views

  20. 2020 Sierra HD reveal 1 2 3 4 5

    By DTB,
    • 67 replies
    • 9.5k views

  21. 2024 gasser going up the Ike with 13K lb. 5th wheel 1 2 3 4 5

    By Jettech1,
    • 67 replies
    • 8.8k views

  22. Wireless Apple Carplay quits working 1 2 3 4 5

    By sigmonster,
    • 64 replies
    • 59.1k views

  23. Ordered 2020 HD 1 2 3 4 5

    By cattledog04,
    • 64 replies
    • 11.3k views

  24. Z71 Option and Other Options 1 2 3 4 5

    By BCGM,
    • 62 replies
    • 19.5k views

  25. Does anybody else hate their seat? 1 2 3 4 5

    By edgexcsp,
    • 62 replies
    • 39.2k views
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