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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.

    5.5k
    posts

1,787 topics in this forum

  1. Alternative to GM# 84876818 camera 1 2 3

    By Chevy350Z,
    • 37 replies
    • 27.8k views

  2. 2024 3500 LT halogen headlights 1 2 3

    By Brain Candle,
    • 37 replies
    • 19.6k views

  3. Gas Tank 1 2 3

    By Zac Davidson,
    • 37 replies
    • 36.3k views

  4. Anyone towing 15-16,000#’s Conventionally with new 2500? 1 2 3

    By fsunole33,
    • 37 replies
    • 4.5k views

  5. truck bed handle 1 2 3

    By Sonders,
    • 37 replies
    • 36k views

  6. Rear Window Leak on 2020 3500HD Denali 1 2 3

    By Pate Services,
    • 37 replies
    • 11.3k views

  7. 2020 2500 HD High Country Issues and GM's lack of caring 1 2 3

    By Wbrisett,
    • 37 replies
    • 14.2k views

  8. BRAKES WENT BAD @ 9800 MILES AND ARE GOING BAD , again @20k miles 1 2 3

    By RGA,
    • 36 replies
    • 9.8k views

  9. Struggling to decide on gas vs diesel for a 14k 37' 5er 1 2 3

    By namtaru,
    • 36 replies
    • 11.4k views

  10. Retrofitted heated seat install 1 2 3

    By Cheekster96,
    • 36 replies
    • 20.9k views

  11. No More Z71 Sport Package?? 1 2 3

    By AngelPhoenix,
    • 36 replies
    • 9.2k views

  12. Will a new 2500 HD fit through a 7 ft tall std garage door? 1 2 3

    By jd64,
    • 36 replies
    • 54.3k views

  13. fuel mileage 1 2 3

    By Bnsfengineer2014,
    • 36 replies
    • 9k views

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

    By FirstAscent,
    • 35 replies
    • 32.7k views

  15. Diesel vs Gas cost to own comparison tool 1 2 3

    By Rozz522,
    • 35 replies
    • 28k views

  16. Strike 1 2 3

    By JW2020,
    • 35 replies
    • 5.6k views

  17. Live From The 2020 Silverado HD Media Introduction 1 2 3

    By Zane,   
    • 35 replies
    • 5.8k views

  18. Positivity and help goes a long way. Share experiences. Help others...this is what forums are all about. 1 2 3

    By Jettech1,
    • 35 replies
    • 2.7k views

  19. Why does anyone still make a 3/4 ton when you can get a 1 ton SRW with a gas motor? 1 2 3

    By UltimateToolReviews,
    • 34 replies
    • 3.9k views

  20. Colour Matched Wheel Arch Mouldings 1 2 3

    By cdnSpinalTap,
    • 34 replies
    • 33.5k views

  21. New here.... considering a switch from Ford F-350 to GMC 3500 1 2 3

    By gascantx,
    • 34 replies
    • 30.8k views

  22. GMC marker lights 1 2 3

    By Bboozer,
    • 34 replies
    • 57.8k views

  23. 'Invisible' trailer camera calibration. 1 2 3

    By Wbrisett,
    • 34 replies
    • 22.8k views

  24. Buying tips 2500 1 2 3

    By Hoginedgewood,
    • 34 replies
    • 5.6k views

  25. Build times for HD's will likely get longer 1 2 3

    By 64BAwagon,
    • 34 replies
    • 5.9k views
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