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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. 2500HD Duramax vs Gas for my use case

    By jj1987,
    • 11 replies
    • 2.6k views

  2. Diff fluid change, ok amount of metal?

    By NWSierra,
    • 3 replies
    • 1.2k views
    • Z45
    • Z45

  3. Fifthwheel options 6'9" bed 1 2

    By Adam9066,
    • 15 replies
    • 19.7k views

  4. Hello, And I Have A Question

    By Core-Lokt,
    • 3 replies
    • 1k views

  5. torque management

    By kylant,
    • 14 replies
    • 4.9k views

  6. Front shock recall

    By Michael621,
    • 6 replies
    • 4.3k views

  7. Upgrade to power trailer mirrors

    By MrSweetchuck,
    • 4 replies
    • 1.9k views

  8. Picked up my "Forest" 2022 AT4 HD a couple weeks ago 1 2

    By AUTOGUY,
    • 23 replies
    • 27.1k views

  9. "things that will go bad"

    By lpg,
    • 14 replies
    • 2.7k views

  10. Towing Miles Tracked on Computer? How to Export?

    By I___F,
    • 3 replies
    • 909 views

  11. 2500 Gasser vs 1500 w/ 6.5' bed

    By trojanone1,
    • 14 replies
    • 2.2k views

  12. High wheel option 20in Bolt pattern wheels and Standard

    By nards444,
    • 3 replies
    • 1.3k views

  13. ON Star Mandatory

    By nards444,
    • 4 replies
    • 1.4k views

  14. High Mileage Tires??

    By shimmy,   
    • 10 replies
    • 9.7k views

  15. Help! What should we be paying for our trucks?

    By mikey00282,
    • 10 replies
    • 2k views

  16. LED Reverse/Cargo light on tow mirror

    By Patrick EuDaly,
    • 7 replies
    • 5.2k views

  17. High Idle Option function Gas and Diesel Heavy Duty trucks 1 2

    By sheath,
    • 21 replies
    • 28.2k views

  18. AT4 Wheels

    By nards444,
    • 6 replies
    • 3.4k views

  19. Wiring in a backup alarm ???? Moved from 2019-2021 Silverado & Sierra

    By Mtbuicknut,
    • 3 replies
    • 8.4k views

  20. Wheel cleaning

    By Cheekster96,
    • 1 reply
    • 867 views

  21. 2023 Silverado HD Order

    By Moe19733,
    • 6 replies
    • 2.8k views

  22. 2019+ jump seat w/storage for sale

    By Excursion745,
    • 1 reply
    • 1k views

  23. What is the stock rim size for my truck need help

    By Blake Rogers,
    • 6 replies
    • 5.9k views

  24. Delivery time frame

    By nards444,
    • 6 replies
    • 4.5k views

  25. In the Red

    By Texas1836,
    • 6 replies
    • 1.6k views

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