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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. tailgate

    By crazydog,
    • 6 replies
    • 1.3k views

  2. size

    By crazydog,
    • 9 replies
    • 1.3k views

  3. Inventory Tracker Updates 1 2

    By Merc0085,
    • 26 replies
    • 3.4k views

  4. Trailer tpms and camera

    By CaptainMorganNC,
    • 6 replies
    • 1.4k views

  5. Is my stock suspension worth anything?

    By gunner25,
    • 0 replies
    • 714 views

  6. 2021 AT4 HD Snow/Camper package reversion?

    By Sheen,
    • 14 replies
    • 9.7k views

  7. Bench vs Console

    By Merc0085,
    • 10 replies
    • 17.1k views

  8. Def tank locking cap

    By Geezizin,
    • 4 replies
    • 9k views

  9. Extended Warranties? 1 2

    By Cory100,
    • 20 replies
    • 4.4k views

  10. Rear Seat Reminder

    By NCCaptainMorgan,
    • 4 replies
    • 5.1k views

  11. Trailer hitch weight rating

    By BigKahuna,
    • 3 replies
    • 6.4k views

  12. Distance from front of receiver hitch to center of hitch pin hole

    By clubba,
    • 7 replies
    • 5.6k views

  13. Front camera view while parking

    By Grjfer,
    • 5 replies
    • 25.3k views

  14. Running 20" Wheels on a Dually

    By cNate,
    • 5 replies
    • 5k views

  15. Active Grill Shutters - mpg?

    By Sheen,
    • 3 replies
    • 5.1k views

  16. 2021 gmc 2500 HD snowplow prep

    By Jkomnick,
    • 3 replies
    • 9k views

  17. First Responder Discount

    By Cory100,
    • 3 replies
    • 1.5k views

  18. Can we talk about the omission of Adaptive Cruise Control 1 2 3 4

    By Chris Eaton,
    • 52 replies
    • 23.1k views

  19. Wax frame coat gotten any better? 1 2

    By nick112288,
    • 15 replies
    • 7.8k views

  20. Bed Power Outlet

    By SJ4591,
    • 3 replies
    • 10.6k views

  21. Looking for tint pictures 1 2

    By nomadicdogg,
    • 24 replies
    • 6.3k views

  22. Anyone running 325/60 r20 on 2500 1 2

    By Chirojh,
    • 16 replies
    • 23.7k views

  23. Military Discount

    By Merc0085,
    • 12 replies
    • 2.8k views

  24. My 2020 HD Being built (maybe)

    By 2021 HD,
    • 1 reply
    • 751 views

  25. Picked it Up here is my thoughts 1 2

    By nards444,
    • 21 replies
    • 4.4k views
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