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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. Trailer average MPG vs Drive Summary

    By rjgvt,
    • 2 replies
    • 1.3k views

  2. 2024 Silverado 2500

    By Baron Davis,
    • 0 replies
    • 916 views

  3. 2024 Silverado 2500

    By Baron Davis,
    • 0 replies
    • 592 views

  4. Will it fit?

    By SuperDuper,
    • 12 replies
    • 13.2k views

  5. Transparent Camera Calibration

    By bruceb58,
    • 5 replies
    • 1.9k views

  6. Intended use.

    By marpel,
    • 3 replies
    • 1.3k views

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

    By Ryno81,
    • 3 replies
    • 1.4k views

  8. Check Engine Air Filter System Message

    By Rob57,   
    • 10 replies
    • 69.8k views

  9. 6.6 Gas operating temperature

    By LOREN,
    • 6 replies
    • 21.7k views

  10. Searching for max payload in a 3500 1 2

    By Michael Butts,
    • 17 replies
    • 5.6k views

  11. Transparent Trailer Camera Calibration

    By bruceb58,
    • 4 replies
    • 1.2k views

  12. 2024 3500 DRW - Michelin Primacy tires 1 2

    By sstoner911,
    • 19 replies
    • 6.7k views

  13. OEM Navigation

    By marpel,
    • 1 reply
    • 960 views

  14. Trailer TPMS Part Number for 2024 HDs?

    By UWSkier,
    • 4 replies
    • 2.8k views

  15. Extended warranty 1 2

    By sno1,
    • 19 replies
    • 16.9k views

  16. High Idle Switch Add

    By bruceb58,
    • 8 replies
    • 10k views

  17. Bed side weight rating 1 2

    By sno1,
    • 23 replies
    • 6.7k views

  18. Trans fluid level in 10L1000 1 2

    By sno1,
    • 25 replies
    • 34.2k views

  19. Checking in 1yr looking back

    By Leonardo Willi,
    • 13 replies
    • 2.1k views

  20. Real Towing Numbers

    By James Beyer,
    • 2 replies
    • 1k views

  21. No 12v Power Outlets 1 2 3

    By UWSkier,
    • 32 replies
    • 72.3k views

  22. Steering slop/play. Normal?

    By UWSkier,
    • 3 replies
    • 1.1k views

  23. Aftermarket 20" Wheels

    By bruceb58,
    • 6 replies
    • 4.5k views

  24. 2025 production start date 1 2

    By vucelick,
    • 16 replies
    • 30.1k views

  25. Immobilizer 1 2

    By Crazy Canuck,
    • 16 replies
    • 5.7k views
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