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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.

    5.6k
    posts

1,791 topics in this forum

  1. Checking in 1yr looking back

    By Leonardo Willi,
    • 13 replies
    • 2.2k views

  2. Real Towing Numbers

    By James Beyer,
    • 2 replies
    • 1.1k views

  3. No 12v Power Outlets 1 2 3

    By UWSkier,
    • 32 replies
    • 74.2k views

  4. Steering slop/play. Normal?

    By UWSkier,
    • 3 replies
    • 1.1k views

  5. Aftermarket 20" Wheels

    By bruceb58,
    • 6 replies
    • 4.8k views

  6. 2025 production start date 1 2

    By vucelick,
    • 16 replies
    • 30.2k views

  7. Immobilizer 1 2

    By Crazy Canuck,
    • 16 replies
    • 5.9k views

  8. GM to recall hd's for tailgate dropping... 1 2 3 4 6

    By gemarsh,
    • 79 replies
    • 15.4k views

  9. 2020+ Rear Axle

    By Big-Cheese,
    • 3 replies
    • 2.1k views

  10. Overall height 2500 AT4.

    By MTY55,
    • 3 replies
    • 6.6k views

  11. Aluminum?

    By C/K Man,
    • 14 replies
    • 40.1k views

  12. Does the exhaust brake operate the brake lights?

    By Brummie99,
    • 2 replies
    • 1k views

  13. 2023 2500HD hood oil canning

    By joe nel,
    • 5 replies
    • 1.1k views

  14. Air ride suspension add to 2021 2500 HD Crew Cab

    By Trey Eckert,
    • 7 replies
    • 4.5k views

  15. Upfitter foil tape

    By rjgvt,
    • 0 replies
    • 1.3k views

  16. I'm so confused....I don't want to let my beloved gasser go.... 1 2 3 4 6

    By Jettech1,
    • 89 replies
    • 10.5k views

  17. Mechanics in Orlando, FL

    By Moyses,   
    • 3 replies
    • 983 views

  18. Silverado 5500HD Integrated Trailer Brake Module Location?

    By 08lt17,
    • 1 reply
    • 3.3k views

  19. Couple interior questions

    By madweazl,
    • 2 replies
    • 944 views

  20. Warranty Challenges by doing your own simple maintenance?

    By ManyCamaroz,
    • 13 replies
    • 2.9k views

  21. GM Bed Mat

    By ManyCamaroz,
    • 7 replies
    • 3.4k views

  22. Any of our HD crew ride motorcycles?

    By Pryme,
    • 7 replies
    • 1.2k views

  23. Goodyear Trailrunner Tires Sidewall Issue 1 2 3

    By twofish,
    • 42 replies
    • 23.5k views

  24. Rumor Has It 1 2

    By littleal,
    • 19 replies
    • 3.1k views

  25. GMC Protection Plans

    By SuperDuper,
    • 3 replies
    • 1.1k views

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