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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.

    5.7k
    posts

1,792 topics in this forum

  1. Top Speed of a 2022 2500HD Gasser 1 2

    By Jettech1,
    • 15 replies
    • 11.5k views

  2. Touch Up Paint

    By SuperDuper,
    • 4 replies
    • 6.2k views

  3. 2024 Sierra and Silverado HD Order Guides 1 2

    By Blubbs,
    • 25 replies
    • 15.7k views

  4. Center console wanted, 2023 HD shipped with wrong seat code

    By ajn,
    • 9 replies
    • 2k views

  5. Educate a potential convert 1 2

    By Hobienick,
    • 15 replies
    • 2.8k views

  6. Cab clearance/running lights

    By ideajim,
    • 1 reply
    • 3k views

  7. 22 GMC Sierra HD has Tailgate & Emergency Brake that ONLY WORKS WITH ELECTRIC POWER ?

    By Cosmic Charlie,
    • 6 replies
    • 1.9k views

  8. Lots of new trucks on the lot now

    By Pryme,
    • 7 replies
    • 1.9k views

  9. Complimentary Onstar Connected Remote Access

    By marpel,
    • 9 replies
    • 2.1k views

  10. Trailer TPMS Sensor Alternative

    By CaptainMorganNC,
    • 11 replies
    • 7.5k views

  11. Went to the Drive-in last night with the beast at the Star light Drive In

    By Jettech1,
    • 9 replies
    • 1.6k views

  12. Window sticker and base prices comparison. Quite surprising for no changes concerning the base truck.

    By Jettech1,
    • 4 replies
    • 1.3k views

  13. How To Unplug Center Stack Power Port?

    By Core-Lokt,
    • 1 reply
    • 706 views

  14. 2020 denali duramax no internet connection??

    By BBE,
    • 9 replies
    • 10.4k views

  15. No air flow from rear seat vents

    By Teresa Barron,
    • 1 reply
    • 5.8k views

  16. Headlight stock on

    By bman03878,
    • 2 replies
    • 871 views

  17. Cruise Control

    By marpel,
    • 11 replies
    • 8.5k views

  18. 10 years of 2WD

    By Hoginedgewood,
    • 14 replies
    • 2k views

  19. 2024 Silverado Midnight edition REQUIRES Z71?

    By pr3dict,
    • 13 replies
    • 5.3k views

  20. 2020 Silverado HD infotainment issue

    By Marcathy,
    • 0 replies
    • 977 views

  21. 2023 Silverado HD special order and allotment 1 2

    By Fish mojo,
    • 16 replies
    • 3.7k views

  22. Auto 4WD works well in the snow and ice. 1 2 3 4

    By sheath,
    • 50 replies
    • 13.7k views

  23. Can you add Nav to a 2023 2500HD LT w/o Factory Nav? 1 2

    By Ken Rackliff,
    • 20 replies
    • 9.5k views

  24. 2020 Sierra Upfitter / Aux Switch Kit Complete

    By FFT,
    • 13 replies
    • 4.4k views
    • FFT
    • FFT

  25. Retrofitted heated seat install 1 2 3

    By Cheekster96,
    • 36 replies
    • 21.8k views
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