Jump to content

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.

    8.8k
    posts

  2. Modifications & Accessories

    Bumper replacements, 5th wheel hitches, auxiliary lighting, and suspension upgrades for your workhorse.

    11k
    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

1,791 topics in this forum

  1. Unused shifter square on 2024 GMC 2500HD

    By rjgvt,
    • 3 replies
    • 3.9k views

  2. 12 volt Aux. Cabin Power for '24 GM Trucks

    By Kerry Pulaski,
    • 2 replies
    • 8.4k views

  3. Lead Time 1 2

    By TeamSaris,
    • 22 replies
    • 8.6k views

  4. Thunderstorm Gray 1 2

    By 453030,
    • 23 replies
    • 19.7k views
    • Ren
    • Ren

  5. Borla XR-1 Muffler Size

    By Nick McDermott,
    • 5 replies
    • 2.3k views

  6. Lumbar Support

    By marpel,
    • 2 replies
    • 4.2k views

  7. 2022 rusted drivetrain components

    By Sonders,
    • 11 replies
    • 3.4k views

  8. Manual seats to power conversion

    By Plateau Rider,
    • 2 replies
    • 3.5k views

  9. Replace standard tailgate with Multi Flex

    By ertmpm,
    • 3 replies
    • 23.3k views

  10. 2021 gmc 3500 3.5 lift

    By buttemines,
    • 1 reply
    • 1.1k views

  11. can't get ignition key out

    By Robert Nadeau,
    • 2 replies
    • 1.2k views

  12. Retirement truck is here

    By Fishfighter,
    • 9 replies
    • 1.7k views

  13. 2024 GMC 3500HD Build Frustrations 1 2 3

    By Nick McDermott,
    • 30 replies
    • 5.5k views

  14. 2024 Digital Instrument Cluster Speedo/Tach Location

    By Tater86,
    • 13 replies
    • 21.7k views

  15. power folding mirrors 1 2

    By Dunn,
    • 16 replies
    • 61.5k views

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

    By SoCal Angler,
    • 44 replies
    • 36.6k views

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

    By 2021 HD,
    • 12 replies
    • 30.6k views

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

    By gregus73,
    • 10 replies
    • 5.4k views

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

    By gascantx,
    • 34 replies
    • 31.8k views

  20. Bumper hitch advice

    By pioneer 1,
    • 4 replies
    • 1.6k views

  21. Cost of maintenance

    By 05 1500HD,
    • 10 replies
    • 31.7k views

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

    By dsr611,
    • 6 replies
    • 2.9k views

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

    By 21GMC,
    • 8 replies
    • 1.6k views

  24. Trailer TPMS system

    By Sumrtime,
    • 1 reply
    • 801 views

  25. Front Camera

    By Catch_KC,
    • 0 replies
    • 2k views
×
×
  • Create New...