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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. 2020 Sierra HD Teaser

    By sk,
    • 2 replies
    • 958 views

  2. Here It Is.... 2020 Silverado HD High Country In The Flesh

    By Sierra Dan,
    • 1 reply
    • 1.6k views

  3. My HD grille fix

    By DTB,
    • 4 replies
    • 4.3k views

  4. 2020 HD's

    By Riverjet502,
    • 4 replies
    • 2.6k views

  5. 2020 HD at Chicago Auto Show?

    By brclark82,
    • 2 replies
    • 1.4k views

  6. The High Country trim Chevrolet Silverado HD dials back the bold 1 2

    By Joe's 2017 Silverado,   
    • 20 replies
    • 4k views

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

    By f8l vnm,
    • 79 replies
    • 19.8k views

  8. Possible silverado hd zr2 concept?

    By Payton34,
    • 3 replies
    • 2k views

  9. First 2020HD picture released by GM media 1 2

    By redwngr,
    • 23 replies
    • 9.3k views

  10. 2020 Silverado HD

    By Brent Darting,
    • 6 replies
    • 4.4k views

  11. 2019 Sierra......No.

    By Mountain motor,
    • 4 replies
    • 2k views

  12. No 2019MY double or reg cab HD's? 1 2

    By redwngr,
    • 17 replies
    • 7.7k views
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