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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. At4 HD Hitch Height

    By CaptainMorganNC,
    • 8 replies
    • 8.9k views

  2. What Took Me So Long?

    By RugbyRef,
    • 4 replies
    • 1.1k views

  3. 2021 getting Wireless CarPlay... 1 2 3 4

    By bharris515,
    • 52 replies
    • 30.3k views

  4. 2500 HD LT Stereo Speakers?

    By Knoxville36,
    • 4 replies
    • 3.4k views

  5. 2021 HD Trailer camera app

    By mavito,
    • 0 replies
    • 1k views

  6. Discounts beyond the normal

    By nards444,
    • 0 replies
    • 838 views

  7. Dimming screen?

    By Bob 3500HD,
    • 3 replies
    • 22.5k views

  8. 2020HD 3500 rear window leak

    By greatmizzou,
    • 2 replies
    • 1.1k views

  9. What mileage are you guys seeing with 35’s???? Mine sucks! 1 2

    By gunner25,
    • 15 replies
    • 10k views
    • Z45
    • Z45

  10. Grease Zerks (Again)

    By Wxman,
    • 3 replies
    • 6.6k views

  11. Paint chipped

    By Andrew Benner,
    • 5 replies
    • 1.5k views

  12. Education Discount 1 2

    By CaptainMorganNC,
    • 15 replies
    • 3.5k views

  13. Heavy Duty front spring package??? 1 2

    By Norman Neufeld,
    • 26 replies
    • 53.9k views

  14. Heated Steering Wheel upgrade - part numbers, etc.

    By NWSierra,
    • 7 replies
    • 13.8k views

  15. 2022 Silverado/Sierra 2500HD ordering guide

    By jd64,
    • 0 replies
    • 2.1k views

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

    By JCunningham,
    • 2 replies
    • 1.5k views

  17. Has anyone found a graphic to place where the allison logo goes on the gas version? 1 2

    By nomadicdogg,
    • 21 replies
    • 13.5k views

  18. Load range E vs F tires

    By kylant,
    • 2 replies
    • 2.2k views

  19. Recalibrate speedo and lower TPMS limits for new tires

    By BigKahuna,
    • 7 replies
    • 1.7k views

  20. Convex Portion of Trailering Mirrors

    By Wxman,
    • 4 replies
    • 6.8k views

  21. 2020 Silverado 2500HD does not recognize a new USB Drive

    By unit,
    • 3 replies
    • 5k views

  22. Anyone Mount a Camper on 21 Silverado 2500HD Duramax Yet?

    By tortiseshell,
    • 11 replies
    • 4.1k views

  23. Bed View Camera on New Silverado 2500HD

    By Dege,
    • 8 replies
    • 11.9k views

  24. VIN # released

    By crf450r,
    • 9 replies
    • 1.3k views

  25. Larger Gasoline Engine Option

    By C/K Man,
    • 10 replies
    • 2.9k views
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