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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.

    8.8k
    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. 275/50/22 on fancy rims (2024 Silverado 1500)

    By TDF89,
    • 7 replies
    • 4.3k views

  2. Flat Tow

    By Weedguy,
    • 13 replies
    • 36.2k views

  3. VIN Numbers

    By BCGM,
    • 6 replies
    • 13.8k views

  4. 2020 GMC 3500 w/ allison 10spd

    By daywright,
    • 2 replies
    • 827 views

  5. Universal Vehicle Module Option

    By rjgvt,
    • 1 reply
    • 5.7k views

  6. Steering Wheel Favorites buttons working intermittently

    By sigmonster,
    • 3 replies
    • 6.2k views

  7. Owners manual 1 2

    By earn3dale,
    • 17 replies
    • 11k views

  8. Trailer average MPG vs Drive Summary

    By rjgvt,
    • 2 replies
    • 1.3k views

  9. 2024 Silverado 2500

    By Baron Davis,
    • 0 replies
    • 932 views

  10. 2024 Silverado 2500

    By Baron Davis,
    • 0 replies
    • 613 views

  11. Will it fit?

    By SuperDuper,
    • 12 replies
    • 13.4k views

  12. Transparent Camera Calibration

    By bruceb58,
    • 5 replies
    • 2k views

  13. Intended use.

    By marpel,
    • 3 replies
    • 1.3k views

  14. Error messages not related "low coolant level" "park assist error" "trailer TPMS issue"

    By Ryno81,
    • 3 replies
    • 1.4k views

  15. Check Engine Air Filter System Message

    By Rob57,   
    • 10 replies
    • 71.3k views

  16. 6.6 Gas operating temperature

    By LOREN,
    • 6 replies
    • 22.2k views

  17. Searching for max payload in a 3500 1 2

    By Michael Butts,
    • 17 replies
    • 5.8k views

  18. Transparent Trailer Camera Calibration

    By bruceb58,
    • 4 replies
    • 1.2k views

  19. 2024 3500 DRW - Michelin Primacy tires 1 2

    By sstoner911,
    • 19 replies
    • 6.9k views

  20. OEM Navigation

    By marpel,
    • 1 reply
    • 973 views

  21. Trailer TPMS Part Number for 2024 HDs?

    By UWSkier,
    • 4 replies
    • 3k views

  22. Extended warranty 1 2

    By sno1,
    • 19 replies
    • 17.6k views

  23. High Idle Switch Add

    By bruceb58,
    • 8 replies
    • 10.5k views

  24. Bed side weight rating 1 2

    By sno1,
    • 23 replies
    • 6.9k views

  25. Trans fluid level in 10L1000 1 2

    By sno1,
    • 25 replies
    • 36.4k views
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