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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. Looking for a good GMC dealer in NJ

    By mjribeiro,
    • 2 replies
    • 635 views

  2. Delivery joke

    By HR3,
    • 14 replies
    • 2.3k views

  3. Thoughts of 2020 Custom HD? 1 2

    By Weatherby460,
    • 17 replies
    • 4.6k views

  4. 2020 hd wheels

    By BB&Chiveon,
    • 0 replies
    • 812 views

  5. 2020 hd OEM 18" steel rims

    By protovack,
    • 0 replies
    • 873 views

  6. Waiting for the 2020 3500 DRW

    By ajcain79,
    • 4 replies
    • 878 views

  7. Shipping via rail

    By cattledog04,
    • 3 replies
    • 967 views
    • HR3
    • HR3

  8. 2020 GMC Sierra Denali 3500HD CC Delivery Problem

    By hawgwild,
    • 9 replies
    • 2.5k views

  9. Color

    By razorwired,
    • 8 replies
    • 1.5k views

  10. 2020 HD not in stock on Long Island?

    By Teach,
    • 0 replies
    • 527 views

  11. Cruise control questions

    By skav,
    • 4 replies
    • 1.5k views

  12. My AT4 HD mods... 1 2

    By bharris515,
    • 15 replies
    • 13.1k views

  13. AT4 mirror caps

    By bharris515,
    • 1 reply
    • 3k views

  14. Realistic pricing at the dealership??

    By WhitProcter,
    • 14 replies
    • 5.4k views

  15. Dual wheel 3500- Landscaping and Snow Plowing Vehicle...

    By Charlie Bierly,
    • 3 replies
    • 836 views

  16. TPMS reprogram?

    By bharris515,
    • 10 replies
    • 4.6k views

  17. Pedal commander for 2020

    By skav,
    • 0 replies
    • 1.1k views

  18. Pedal adjustment on 2020???

    By skav,
    • 5 replies
    • 27.4k views

  19. Just wondeing about delay

    By Sunshine39,
    • 2 replies
    • 1.6k views

  20. 2020 suspension options

    By skav,
    • 2 replies
    • 1.6k views

  21. Breakout Technical Forums Are Here

    By Zane,
    • 0 replies
    • 1.2k views

  22. When will they hit the dealer lots???? 1 2 3 4

    By wowens79,
    • 54 replies
    • 9.9k views

  23. What wheels and tires are you going with?

    By Coolade,
    • 5 replies
    • 8.7k views

  24. Auction price results

    By yamahauler99,
    • 0 replies
    • 683 views

  25. Truck Dimensions

    By redwngr,
    • 12 replies
    • 25.4k views
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