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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. 2024 2500 HD LTZ cold start and drive engine noise

    By Black Smoke,
    • 1 reply
    • 1.2k views

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

    By Scotty_B,
    • 13 replies
    • 3.2k views

  3. Active Lane Keep

    By macgeng,
    • 7 replies
    • 6.2k views

  4. Dual Battery Question 1 2 3

    By revrnd,
    • 38 replies
    • 10.6k views

  5. 2018 GMC DMax to 2025 Custom Gas

    By Icutmetl,
    • 13 replies
    • 1.9k views

  6. Front seats

    By Joe nesbitt,
    • 2 replies
    • 978 views

  7. 2024+ HD LED Headlamp Install from Halogen on LT trim?

    By Coop8202,
    • 7 replies
    • 8.7k views

  8. Build times for HD's will likely get longer 1 2 3

    By 64BAwagon,
    • 34 replies
    • 6k views

  9. Color Discrepancy?

    By AndrewF,
    • 13 replies
    • 11.1k views

  10. Chevy HD discounts upcoming?

    By vucelick,
    • 6 replies
    • 4.2k views

  11. [?] Anyone able to force fullscreen CarPlay/AAuto

    By lvalentin,   
    • 9 replies
    • 33.9k views

  12. 2024 Silverado 2500 HD rear windows

    By Larry Ribble,
    • 3 replies
    • 2.2k views

  13. 18" Tire Replacement

    By hs5870,
    • 4 replies
    • 2k views

  14. 2023 3500 Denali Dually. Hill Assist & Hill Decent

    By Bob Mc Kenzie,
    • 2 replies
    • 1.2k views

  15. Floor Liner Question

    By revrnd,
    • 9 replies
    • 1.3k views

  16. Electronic controls quit working intermittently

    By sigmonster,
    • 0 replies
    • 597 views

  17. Discount Dealer on East Coast

    By bruceb58,
    • 0 replies
    • 679 views

  18. Very large addition being added to Flint assembly. 1 2 3 4 5

    By 64BAwagon,
    • 73 replies
    • 10.1k views

  19. Ramp Support Patent

    By revrnd,
    • 2 replies
    • 846 views

  20. 2022 Chev 3500HD Dually rear spindle nut

    By Brad Clarke,
    • 2 replies
    • 12.8k views

  21. New 2024 3500HD Software Update? 1 2 3

    By Rick_,
    • 33 replies
    • 13.9k views

  22. 6.6 Gas Hood Question/Battery Drain

    By colts,   
    • 3 replies
    • 3.5k views

  23. Fast Idle UF3 Update

    By bruceb58,
    • 8 replies
    • 2.8k views

  24. truck bed handle 1 2 3

    By Sonders,
    • 37 replies
    • 37.4k views

  25. T1XX Torsion Bar Question 1 2 3

    By revrnd,
    • 30 replies
    • 4.2k views
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