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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

1,787 topics in this forum

  1. Do I need/want Hill Descent Control? 1 2

    By FirstAscent,
    • 25 replies
    • 37k views

  2. LOW POWER MODE!! GM exhaust Nightmare!!! after cleaning exhaust filter 2020 HD 1 2

    By Scot Knutson,   
    • 20 replies
    • 36.7k views

  3. DEF usage on 2020 HD models 1 2

    By Wbrisett,
    • 28 replies
    • 36.7k views

  4. Just shock upgrade.. 1 2

    By Londart2020,
    • 20 replies
    • 36.4k views

  5. Gas Tank 1 2 3

    By Zac Davidson,
    • 37 replies
    • 36.4k views

  6. 2021 Silverado 2500HD Tailgate Removal & Back On 1 2

    By tortiseshell,
    • 17 replies
    • 36.3k views

  7. truck bed handle 1 2 3

    By Sonders,
    • 37 replies
    • 36k views

  8. TPMS Relearn Tool 1 2

    By marpel,
    • 19 replies
    • 35.5k views

  9. adaptive cruise control not working

    By Oats467,
    • 12 replies
    • 35.4k views

  10. Break-In Procedures Per Manual.....??? 1 2 3

    By SoCal Angler,
    • 44 replies
    • 35.3k views

  11. Flat Tow

    By Weedguy,
    • 13 replies
    • 35.3k views

  12. INVISIBLE TRAILER CAMERA

    By BIG -G,   
    • 14 replies
    • 35.1k views

  13. adjustable drop hitch

    By georgecdisc,
    • 10 replies
    • 35k views

  14. What is your 2020's ACTUAL Payload? 1 2 3

    By ApertureX,   
    • 43 replies
    • 35k views

  15. TPMS Sensors with Advanced Trailering Package 1 2 3

    By bigman32hockey,
    • 39 replies
    • 34.7k views

  16. Trans fluid level in 10L1000 1 2

    By sno1,
    • 25 replies
    • 34.2k views

  17. Help me decide--1500 vs 2500 1 2 3

    By protovack,
    • 43 replies
    • 34.2k views

  18. Exhaust Brake

    By bharris515,
    • 14 replies
    • 34.2k views
    • Dunn
    • Dunn

  19. 2021 SIlverado 2500HD Ride Quality & Wheel Questions 1 2

    By M Parr,
    • 27 replies
    • 33.8k views

  20. Colour Matched Wheel Arch Mouldings 1 2 3

    By cdnSpinalTap,
    • 34 replies
    • 33.6k views

  21. 10 speed vs 6 speed Difference

    By James Beyer,
    • 6 replies
    • 33.5k views

  22. [?] Anyone able to force fullscreen CarPlay/AAuto

    By lvalentin,   
    • 9 replies
    • 33.1k views

  23. Do you keep your tires at full capacity? 80psi 1 2 3

    By FirstAscent,
    • 35 replies
    • 32.7k views

  24. auto fold mirrors

    By texasnavy05,
    • 7 replies
    • 32.5k views

  25. 2020 3500HD with heavy duty front spring package? 1 2 3

    By MrChips,
    • 37 replies
    • 32k views

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