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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. Lumbar Support

    By marpel,
    • 2 replies
    • 4.1k views

  2. 2022 rusted drivetrain components

    By Sonders,
    • 11 replies
    • 3.3k views

  3. Manual seats to power conversion

    By Plateau Rider,
    • 2 replies
    • 3.4k views

  4. Replace standard tailgate with Multi Flex

    By ertmpm,
    • 3 replies
    • 22.6k views

  5. 2021 gmc 3500 3.5 lift

    By buttemines,
    • 1 reply
    • 1.1k views

  6. can't get ignition key out

    By Robert Nadeau,
    • 2 replies
    • 1.2k views

  7. Retirement truck is here

    By Fishfighter,
    • 9 replies
    • 1.6k views

  8. 2024 GMC 3500HD Build Frustrations 1 2 3

    By Nick McDermott,
    • 30 replies
    • 5.4k views

  9. 2024 Digital Instrument Cluster Speedo/Tach Location

    By Tater86,
    • 13 replies
    • 21.1k views

  10. power folding mirrors 1 2

    By Dunn,
    • 16 replies
    • 60.5k views

  11. Break-In Procedures Per Manual.....??? 1 2 3

    By SoCal Angler,
    • 44 replies
    • 35.4k views

  12. What rear and what locker are in the new HD's

    By 2021 HD,
    • 12 replies
    • 29.6k views

  13. Traded my 2022 2500 LT for 2024 2500 High Country

    By gregus73,
    • 10 replies
    • 5.4k views

  14. New here.... considering a switch from Ford F-350 to GMC 3500 1 2 3

    By gascantx,
    • 34 replies
    • 30.9k views

  15. 2024 SILVERADO 3500HD DURAMAX CLOGGED DPF AND WONT CONNECT TO TRAILERS 1 2

    By Clark Shirley,
    • 26 replies
    • 14k views

  16. Bumper hitch advice

    By pioneer 1,
    • 4 replies
    • 1.5k views

  17. Cost of maintenance

    By 05 1500HD,
    • 10 replies
    • 30.7k views

  18. Newer truck issues to be aware of...

    By dsr611,
    • 6 replies
    • 2.8k views

  19. Question for HD owners in King/Pierce counties - Western Washington State

    By 21GMC,
    • 8 replies
    • 1.6k views

  20. Trailer TPMS system

    By Sumrtime,
    • 1 reply
    • 789 views

  21. Front Camera

    By Catch_KC,
    • 0 replies
    • 2k views

  22. GMC 2500 and 3500 bumper badges 1 2

    By Sam Avaiusini,
    • 19 replies
    • 5.9k views

  23. Dealer can pickup your truck

    By Fishfighter,
    • 0 replies
    • 889 views

  24. Lakeshore Blue Metallic

    By keith ingram,
    • 6 replies
    • 14k views

  25. Code PO422

    By chwilliams,
    • 2 replies
    • 2.4k views
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