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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

1,789 topics in this forum

  1. Actual 2020 2500HD Parts Online?

    By ROOK Lucky 13,
    • 1 reply
    • 756 views

  2. 2021 Sierra doors Auto Unlock in Park

    By grady475,
    • 1 reply
    • 755 views

  3. Hill Start Assist Sensor Adjustment?

    By AndrewF,
    • 2 replies
    • 752 views

  4. WTH is with Ordering a New Truck- Here, Take My Money!

    By 426ted,
    • 7 replies
    • 751 views

  5. Weird Idle

    By Jettech1,
    • 11 replies
    • 751 views

  6. 2020 Silverado hd wiring harness

    By Marcathy,
    • 0 replies
    • 749 views

  7. Infortainment Center Lock up

    By Craig Pell,
    • 1 reply
    • 749 views

  8. My 2020 HD Being built (maybe)

    By 2021 HD,
    • 1 reply
    • 749 views

  9. If you have the unlimited data plan can you test something for me???

    By BBE,
    • 2 replies
    • 748 views

  10. Advertisement Video for All New Electric GMC Hummer EV

    By Austinamp,
    • 2 replies
    • 745 views

  11. Carfax

    By marpel,
    • 2 replies
    • 742 views

  12. Album Art with iphone

    By Morpheus5150,
    • 1 reply
    • 740 views

  13. 2021 duramax engine light

    By Pnoman,
    • 0 replies
    • 718 views

  14. Stumped! Single clunk/pop when turning slow

    By 22 6.6gasser,
    • 6 replies
    • 716 views

  15. Is my stock suspension worth anything?

    By gunner25,
    • 0 replies
    • 714 views

  16. Happy Fathers day to you all!!

    By Jettech1,
    • 6 replies
    • 713 views

  17. Retract Pro Max Tanau Cover fitting over the Fifth Wheel Hitch?

    By Mid-Night Rider,
    • 3 replies
    • 710 views

  18. OIL REBATE

    By littleal,
    • 0 replies
    • 704 views

  19. Thumper36

    By Thumper36,
    • 2 replies
    • 702 views

  20. Side air bags

    By Rld1017,
    • 1 reply
    • 700 views

  21. Winter wheels offset

    By Crazy Canuck,
    • 0 replies
    • 692 views

  22. Chrome window trim

    By 2020OklahomaDenali,
    • 0 replies
    • 691 views

  23. Auction price results

    By yamahauler99,
    • 0 replies
    • 685 views

  24. MAP Sensor Cleaning L5P

    By Crazy Canuck,
    • 6 replies
    • 681 views

  25. "Strange" DIC Splash

    By Wxman,
    • 0 replies
    • 675 views
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