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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.

    5.6k
    posts

1,787 topics in this forum

  1. The same new emissions that are destroying the motorhome chassis are coming to HD's 1 2 3 4 7

    By 64BAwagon,
    • 93 replies
    • 7.4k views

  2. Dash Backlight Auto-Dim

    By AndrewF,
    • 6 replies
    • 6.5k views

  3. 2024 Front Licence Plate Bracket

    By revrnd,
    • 3 replies
    • 1.7k views

  4. Front Collision Alert Removal

    By AndrewF,
    • 5 replies
    • 13.6k views

  5. Snow tires 1 2

    By rjgvt,
    • 21 replies
    • 5.3k views

  6. Wrecked Multi-Flex tailgate replacement? 1 2

    By davidm767,
    • 17 replies
    • 4k views

  7. Factorymanuals.net.....If used, what have been your experiences?

    By SoCal Angler,
    • 13 replies
    • 12.2k views

  8. High Country Question

    By revrnd,
    • 2 replies
    • 1.3k views

  9. LED replacement bulbs for the LT, custom and WT models with halogen brake lamps

    By 64BAwagon,
    • 3 replies
    • 1k views

  10. Why doesnt Oshawa build a Tim Hortons edition ? 1 2

    By 64BAwagon,
    • 20 replies
    • 1.8k views

  11. ⚠️ Recall Issued N242454440 2020-2022 1500 and 2500's Momentary Rear Wheel Lockup

    By ManyCamaroz,
    • 2 replies
    • 2.7k views

  12. tpms sensors when swapping wheels 1 2

    By Sonders,
    • 28 replies
    • 10.4k views

  13. Rotten Egg Smell

    By WhoDey,
    • 7 replies
    • 5.7k views

  14. BCGM Truck Purchased 1 2 3 4 7

    By BCGM,
    • 104 replies
    • 8.9k views

  15. USB to 12 Volt Adapter 1 2

    By revrnd,
    • 16 replies
    • 6.2k views

  16. Pandora not available in Apps settings 2024 Sierra

    By cabledude,
    • 1 reply
    • 2.2k views

  17. 2023 2500HD front brakes

    By Jimmy in NC,
    • 4 replies
    • 7.7k views

  18. Screw in tire. Would you do anything?

    By Pryme,
    • 10 replies
    • 1.2k views

  19. Some GMC Sierra HD Units Will Need A Transmission Filter Replacement 1 2

    By Ozark Dually,
    • 23 replies
    • 5.6k views

  20. Upfitter for 2024 2500HD AT4, Denali

    By rjgvt,
    • 6 replies
    • 5.9k views

  21. 2024 Silverado HD ZR2 - Cognito 'Super Stock Kit'

    By dirtracer455,
    • 3 replies
    • 2.2k views

  22. 2020 Chevy 2500 HD WT not opening

    By Gabe montoya,
    • 0 replies
    • 583 views

  23. 2024 Sierra 3500 marker lights install

    By Arsoncop,
    • 3 replies
    • 1.3k views

  24. 2025 GMC Ultimate Denali 2500HD Infotainment Locked -up

    By Todds Tap Room,
    • 2 replies
    • 2.1k views

  25. 2500 vs 3500 Suspension

    By revrnd,
    • 4 replies
    • 2.1k views
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