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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. Tire Rotation 1 2 3 4 5

    By BCGM,
    • 69 replies
    • 16.8k views

  2. 2024 Headlight Condensation

    By BCGM,
    • 7 replies
    • 4.3k views

  3. 35/12.5/r20

    By Robbie R,
    • 14 replies
    • 11.8k views

  4. Center Jump complete disassemble

    By Sonders,
    • 1 reply
    • 936 views

  5. Wiring diagram needed - trailer lights always on

    By Chopper_Man,
    • 13 replies
    • 11.2k views

  6. Charging Batteries

    By Bob P.,
    • 5 replies
    • 6.8k views

  7. Nothing but PROBLEMS with the 2024 GMC Denali Ultimate 2500 1 2

    By ShibaPauly,   
    • 23 replies
    • 58.8k views

  8. Autotrac transfer case vs regular 1 2

    By nick112288,
    • 24 replies
    • 55.7k views

  9. Text Messages

    By marpel,
    • 0 replies
    • 949 views

  10. Black Bumper Paint Questions

    By AndrewF,
    • 6 replies
    • 4k views

  11. 2024 3500 LT halogen headlights 1 2 3

    By Brain Candle,
    • 37 replies
    • 19.9k views

  12. Service power steering

    By Dave Covelli,
    • 2 replies
    • 837 views

  13. Extended Warranty Plans For The Deisels

    By a_user,
    • 3 replies
    • 1.4k views

  14. Trailer TPMS for 2024 Silverado 2500 HD LTZ- where to buy

    By Martins00,
    • 4 replies
    • 1.1k views

  15. Red tow hooks for front of 2024 Silverado HD LTZ

    By Black Smoke,
    • 9 replies
    • 3.7k views

  16. VIN ASSIGNED.

    By Tincan53,
    • 8 replies
    • 13.7k views

  17. Z71 Option and Other Options 1 2 3 4 5

    By BCGM,
    • 62 replies
    • 20.4k views

  18. Max spare tire size 1 2

    By kylant,
    • 15 replies
    • 19.5k views

  19. Problems after replacing front wheel bearing hubs

    By Russ Newman,
    • 6 replies
    • 4.6k views

  20. Ranch Hand Bumper and touch free carwash

    By chevy2tuff2k6,
    • 2 replies
    • 1.7k views

  21. 6 speed or 10 speed Allison. Which do you prefer? 1 2

    By Gray,
    • 24 replies
    • 75.4k views

  22. 2024 Grill Bar

    By AndrewF,
    • 0 replies
    • 893 views

  23. Wireless Apple Carplay quits working 1 2 3 4 5

    By sigmonster,
    • 64 replies
    • 60.3k views

  24. Interior grey pillar trim color?

    By erick_e,
    • 4 replies
    • 3.2k views

  25. 2024 GMC Denali ultimate accessories

    By Troy90,
    • 0 replies
    • 1.3k views
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