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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. 2020 Chevy 2500HD Rear Trailer Camera

    By fsh4eye,
    • 1 reply
    • 2.2k views

  2. Trouble Shifting (shuddering/drops power) around 45mph on light acceleration

    By uh33nowit,
    • 4 replies
    • 2.2k views

  3. Low oil level in L8T but oil full on dipstick

    By Timu8,
    • 2 replies
    • 2.2k views

  4. Hate the Soft roll up

    By nards444,
    • 12 replies
    • 2.2k views

  5. 2024 Silverado HD ZR2 - Cognito 'Super Stock Kit'

    By dirtracer455,
    • 3 replies
    • 2.2k views

  6. Load range E vs F tires

    By kylant,
    • 2 replies
    • 2.2k views

  7. 3500 x31 vs regular 4x4

    By Pilsner Man,
    • 2 replies
    • 2.2k views

  8. My New Ride...

    By fly53usmc,
    • 10 replies
    • 2.2k views

  9. Camera System malfunction - 2020 GMC AT4 3500

    By JonCraig,
    • 1 reply
    • 2.2k views

  10. Pandora not available in Apps settings 2024 Sierra

    By cabledude,
    • 1 reply
    • 2.2k views

  11. Downpour Metallic not available on specific Trims

    By Red Hawk,
    • 1 reply
    • 2.2k views

  12. 2020 Model Year, Things I like and improvements I would like 1 2

    By Wbrisett,
    • 16 replies
    • 2.2k views

  13. 2021 Delivered

    By TrailBoss1,
    • 7 replies
    • 2.2k views

  14. 2021 Silverado 2500HD High Country Duramax!

    By BrianMello,
    • 3 replies
    • 2.2k views

  15. 2022 3500 HC Cameras

    By mjonesjr84,
    • 4 replies
    • 2.2k views

  16. Phone Holder Recommendation?

    By msobczyk,
    • 4 replies
    • 2.2k views

  17. 2020 Silverado 2500hd Purchase Price

    By 347pewterz,
    • 4 replies
    • 2.2k views

  18. Am I missing something or did GM drop the ball?

    By Sumrtime,
    • 9 replies
    • 2.2k views

  19. 2022 High Country

    By Michael621,
    • 5 replies
    • 2.2k views

  20. Dually Tire Question(s)

    By jeffd,
    • 7 replies
    • 2.1k views
    • RGA
    • RGA

  21. GMC vs Chevrolet Pricing

    By bullet225ho,
    • 7 replies
    • 2.1k views

  22. Checking in 1yr looking back

    By Leonardo Willi,
    • 13 replies
    • 2.1k views

  23. 2020 GMC Sierra 3500 bed rail tie down

    By CalN,
    • 4 replies
    • 2.1k views

  24. New Member 2021 Silverado 2500HD (On-Order)

    By JakeFromStateFarm,
    • 3 replies
    • 2.1k views

  25. Stock 17 to “stock” 20 calibrations? 1 2

    By mandrewbot3k,
    • 19 replies
    • 2.1k views
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