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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. 2022 3500 HC Cameras

    By mjonesjr84,
    • 4 replies
    • 2.2k views

  2. Tailgate Ramps

    By tbully,
    • 8 replies
    • 5.6k views

  3. 22 2500 HD stock door trim, same front and rear?

    By 22z712500,
    • 9 replies
    • 1.1k views

  4. Has anyone?

    By KingAtor,
    • 4 replies
    • 1.3k views

  5. 2022 - 2500 Custom vs. 1500 Custom Trail Boss

    By CFRED70,
    • 13 replies
    • 7.8k views

  6. Sunroof Question...

    By ApertureX,   
    • 8 replies
    • 14.7k views

  7. Upfitter switches 1 2 3 4 10

    By Truckchauffeur,
    • 146 replies
    • 168k views

  8. Happy days

    By crf450r,
    • 3 replies
    • 1k views

  9. What options have you tried?

    By Cheekster96,
    • 9 replies
    • 1.4k views

  10. 2021 GMC 2500 Denali Electrical Problems

    By David Droulard,
    • 2 replies
    • 5.6k views

  11. roof marker lights 1 2

    By kylant,
    • 23 replies
    • 28.1k views

  12. Zone Lift and back spacing on stock wheels

    By Dusilligaf,
    • 0 replies
    • 812 views

  13. 2021 Silverado 2500HD Tailgate Removal & Back On 1 2

    By tortiseshell,
    • 17 replies
    • 36.3k views

  14. Supplier discount codes

    By geekpipe,
    • 0 replies
    • 1.1k views

  15. AT4 base model???? Options? Still a NICE truck?

    By Gabe Bunn,
    • 2 replies
    • 1.6k views

  16. Full coil over lift for 2500 AT4?

    By YourSpecialist,
    • 7 replies
    • 11.1k views

  17. 2500/3500 Denali visual differences? 1 2

    By gemarsh,
    • 22 replies
    • 9.3k views

  18. GM Family First????? Anyone know a dealer in Alabama/Georgia area that is allowing or doing GM family pricing?

    By Gabe Bunn,
    • 9 replies
    • 2.6k views

  19. 2022 recalls

    By Adam9066,
    • 1 reply
    • 12.1k views

  20. Factory tires rated less than manufacturer?

    By Guest Phobby,
    • 12 replies
    • 1.9k views
    • Guest
    • Guest

  21. All GMC Sierra 1500 and HD's $300 over invoice

    By Nathan Young,
    • 9 replies
    • 4.5k views

  22. 5th wheel puck system

    By greatmizzou,
    • 10 replies
    • 37.7k views

  23. Few or Several

    By James Beyer,
    • 8 replies
    • 1.3k views

  24. 2021 Chevy 2500HD 6.6 Gas functional hood intake

    By B Heard,
    • 8 replies
    • 16.9k views

  25. Banks idash mount

    By gemarsh,
    • 3 replies
    • 5.4k views

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