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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. HF Franklin Step Stool

    By rjgvt,
    • 7 replies
    • 2k views

  2. Anyone in the E Tex/Nw Louisiana/Arkansas area want to trade wheels?

    By No F-bdy Bs,
    • 5 replies
    • 498 views

  3. Free fender tie back

    By Cracksrubi,
    • 2 replies
    • 541 views

  4. T1xx vs K2xx HD trucks

    By Pryme,
    • 1 reply
    • 717 views

  5. Adding a 2024+ gooseneck wiring plug

    By AndrewF,
    • 14 replies
    • 2.9k views

  6. Looks like Allison is really mad at GM 1 2

    By Homer1959,
    • 25 replies
    • 4.9k views

  7. SERVICE ESC SYSTEM, POWER REDUCED, POWER ASSIST OFF.

    By SIXFOUR,
    • 6 replies
    • 1.5k views

  8. !#@%* Emissions System

    By 426ted,
    • 12 replies
    • 1.8k views

  9. Trailer TPMS Sensor Pairing 2024 Denali

    By bruceb58,
    • 11 replies
    • 10.4k views

  10. Trim Height Specifications

    By Epsilon Plus,
    • 4 replies
    • 994 views

  11. TPMS Sensors with Advanced Trailering Package 1 2 3

    By bigman32hockey,
    • 39 replies
    • 35.2k views

  12. Firestone Transforce LT Blowout

    By PFTX_5.3,
    • 6 replies
    • 838 views

  13. 2023 Sierra

    By Phantom 4D,
    • 4 replies
    • 562 views

  14. 2024 6.6 gas vibration and some other small things..

    By TeamSaris,
    • 4 replies
    • 706 views

  15. Anyone know the type of zerk fittings our trucks use?

    By Pryme,
    • 14 replies
    • 997 views

  16. 6.2 owner ready to jump ship to 6.6 gasser 1 2 3 4 5

    By dieselfan1,
    • 71 replies
    • 8k views

  17. Transfer Case Drain Plug

    By Epsilon Plus,
    • 6 replies
    • 3.8k views

  18. 2024 On Its Way 1 2 3

    By revrnd,
    • 39 replies
    • 5.3k views

  19. Edge Insight CTS3

    By JW2024,
    • 2 replies
    • 529 views

  20. Uneven rear suspension 1 2

    By Homer1959,
    • 26 replies
    • 2.8k views

  21. To be honest ... the Ford Ecoboost 3.5 vs ... 1 2 3 4

    By Homer1959,
    • 51 replies
    • 10.5k views

  22. INVISIBLE TRAILER CAMERA

    By BIG -G,   
    • 14 replies
    • 35.6k views

  23. 2024 Leaking

    By kevin74,
    • 7 replies
    • 3.1k views

  24. Programming Key Fobs

    By bruceb58,
    • 11 replies
    • 30.7k views

  25. Which Truck

    By James Beyer,
    • 10 replies
    • 1.3k views

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