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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. LWB leveled trucks 1 2

    By 2011Chevy,   
    • 16 replies
    • 6.3k views

  2. 2023 Silverado 2500HD Custom - Steering Wheel Upgrade 1 2

    By lmullenaux,
    • 16 replies
    • 20.8k views

  3. Anyone running 325/60 r20 on 2500 1 2

    By Chirojh,
    • 16 replies
    • 23.6k views

  4. Thoughts on Android Auto or CarPlay 1 2

    By HiggySTL,
    • 16 replies
    • 4.5k views

  5. 2020 Model Year, Things I like and improvements I would like 1 2

    By Wbrisett,
    • 16 replies
    • 2.2k views

  6. Biggest tire size on stock 18' Rim? 1 2

    By Sniperdan,
    • 16 replies
    • 91k views

  7. 2025 production start date 1 2

    By vucelick,
    • 16 replies
    • 30.1k views

  8. New truck 1 2

    By Pnoman,
    • 16 replies
    • 3.5k views

  9. What mudflaps for 2020 HD? 1 2

    By Weatherby460,
    • 16 replies
    • 17.5k views

  10. GM and Ford to Halt Production 1 2

    By cdnSpinalTap,
    • 16 replies
    • 1.9k views

  11. The 20" Factory Goodyears are finally starting to make some noise 1 2

    By Jettech1,
    • 16 replies
    • 1.3k views

  12. has anyone heard about there being a constraint on the gas engine?? 1 2

    By BBE,
    • 16 replies
    • 3.2k views

  13. Double cab drivers need your input... 1 2

    By 03 Cobra,
    • 16 replies
    • 7.9k views

  14. Purchase 2500 HD in Canada 1 2

    By BCGM,
    • 16 replies
    • 7.8k views

  15. Immobilizer 1 2

    By Crazy Canuck,
    • 16 replies
    • 5.7k views

  16. Rust Proofing 2024 GMC Sierra HD due to NY Winters 1 2

    By Savannah Ottman,
    • 16 replies
    • 6.8k views

  17. Trade In Value 1 2

    By NCCaptainMorgan,
    • 16 replies
    • 3.8k views

  18. Feb Incentives 1 2

    By agcntry,
    • 16 replies
    • 3.9k views

  19. 1st 500-miles review - Please let me know if you share any of these issues! 1 2

    By Brianb33,
    • 16 replies
    • 6.2k views
    • Dunn
    • Dunn

  20. 1300 miles towing our camper 1 2

    By Jettech1,
    • 16 replies
    • 2.5k views

  21. I haven't been around much lately.... how ta hell are you doing? 1 2

    By Jettech1,
    • 16 replies
    • 1.7k views

  22. Single Gauge Mount (52mm Vent or Pillar) 1 2

    By WinterSpringsSierra,   
    • 16 replies
    • 23.1k views

  23. 2024 gmc 3500 dually questions 1 2

    By Mike Weinandy,
    • 16 replies
    • 2.9k views

  24. Rear Under Seat Storage 1 2

    By bigman32hockey,
    • 16 replies
    • 40.7k views

  25. 2023 Silverado HD special order and allotment 1 2

    By Fish mojo,
    • 16 replies
    • 3.7k views

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