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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. Autotrac transfer case vs regular 1 2

    By nick112288,
    • 24 replies
    • 54.3k views

  2. Text Messages

    By marpel,
    • 0 replies
    • 917 views

  3. Black Bumper Paint Questions

    By AndrewF,
    • 6 replies
    • 3.6k views

  4. 2024 3500 LT halogen headlights 1 2 3

    By Brain Candle,
    • 37 replies
    • 19.6k views

  5. Service power steering

    By Dave Covelli,
    • 2 replies
    • 791 views

  6. Extended Warranty Plans For The Deisels

    By a_user,
    • 3 replies
    • 1.3k views

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

    By Martins00,
    • 4 replies
    • 1.1k views

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

    By Black Smoke,
    • 9 replies
    • 3.5k views

  9. VIN ASSIGNED.

    By Tincan53,
    • 8 replies
    • 13.6k views

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

    By BCGM,
    • 62 replies
    • 19.5k views

  11. Max spare tire size 1 2

    By kylant,
    • 15 replies
    • 18.9k views

  12. Problems after replacing front wheel bearing hubs

    By Russ Newman,
    • 6 replies
    • 4.3k views

  13. Ranch Hand Bumper and touch free carwash

    By chevy2tuff2k6,
    • 2 replies
    • 1.7k views

  14. 6 speed or 10 speed Allison. Which do you prefer? 1 2

    By Gray,
    • 24 replies
    • 74.5k views

  15. 2024 Grill Bar

    By AndrewF,
    • 0 replies
    • 876 views

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

    By sigmonster,
    • 64 replies
    • 59.1k views

  17. Interior grey pillar trim color?

    By erick_e,
    • 4 replies
    • 3k views

  18. 2024 GMC Denali ultimate accessories

    By Troy90,
    • 0 replies
    • 1.3k views

  19. 2024 2500 HD LTZ cold start and drive engine noise

    By Black Smoke,
    • 1 reply
    • 1.2k views

  20. Don't know that this package of wires and fuse box is that came witht he truck

    By Scotty_B,
    • 13 replies
    • 2.9k views

  21. Active Lane Keep

    By macgeng,
    • 7 replies
    • 5.8k views

  22. Dual Battery Question 1 2 3

    By revrnd,
    • 38 replies
    • 9.6k views

  23. 2018 GMC DMax to 2025 Custom Gas

    By Icutmetl,
    • 13 replies
    • 1.8k views

  24. Front seats

    By Joe nesbitt,
    • 2 replies
    • 910 views

  25. 2024+ HD LED Headlamp Install from Halogen on LT trim?

    By Coop8202,
    • 7 replies
    • 8.3k views
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