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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. L5P hydro lock

    By Scott1955,
    • 3 replies
    • 5.5k views
    • Z45
    • Z45

  2. 2020 silverado 2500hd3000hd cab to axle measurements

    By 94yj,
    • 2 replies
    • 5.4k views

  3. 2024 HD Changes

    By C/K Man,
    • 11 replies
    • 5.4k views

  4. 2024 GMC 3500HD Build Frustrations 1 2 3

    By Nick McDermott,
    • 30 replies
    • 5.4k views

  5. Ordered my retirement truck 1 2 3

    By Fishfighter,
    • 38 replies
    • 5.4k views

  6. 2020 3500 dually tail light lenses

    By Pfc1,
    • 7 replies
    • 5.4k views

  7. Banks idash mount

    By gemarsh,
    • 3 replies
    • 5.4k views

  8. Realistic pricing at the dealership??

    By WhitProcter,
    • 14 replies
    • 5.4k views

  9. Update with picture - Gum Creek Vehicle Handgun Holster

    By Say When,
    • 7 replies
    • 5.4k views

  10. Traded my 2022 2500 LT for 2024 2500 High Country

    By gregus73,
    • 10 replies
    • 5.4k views

  11. X31 Off Road Suspension with Rancho...what is it?

    By roegs,
    • 2 replies
    • 5.4k views

  12. Drain plugs or access ports

    By dquest,
    • 3 replies
    • 5.4k views

  13. Who doesn't love a Denali??? But those wheels?? 1 2 3

    By Jettech1,
    • 30 replies
    • 5.4k views

  14. And here we go with the whole tail "gate" and "water gate" issue of it opening on its own!

    By Jettech1,
    • 14 replies
    • 5.3k views

  15. Typical build to delivery time? v.2021Denali

    By ktreece,
    • 7 replies
    • 5.3k views

  16. Snow tires 1 2

    By rjgvt,
    • 21 replies
    • 5.3k views

  17. Jump Seat Removal - Need storage 2020 Custom 2500

    By Ryan Berry,
    • 0 replies
    • 5.3k views

  18. Fire Fire!!

    By chris's 1ton,
    • 5 replies
    • 5.3k views

  19. 2024 GMC Sierra SLE With Bucket Seats?

    By Haoleguy,
    • 5 replies
    • 5.3k views

  20. Anybody have part#'s for metal skid plates

    By chevy2tuff2006,
    • 1 reply
    • 5.3k views

  21. Videos on 2020 HD Design & Advanced Trailering Camera System

    By Zane,   
    • 10 replies
    • 5.3k views

  22. LED Reverse/Cargo light on tow mirror

    By Patrick EuDaly,
    • 7 replies
    • 5.2k views

  23. Trailer Camera

    By marpel,
    • 4 replies
    • 5.2k views

  24. 24 Hours With a 2020 Silveado HD (T1) 1 2

    By newdude,   
    • 15 replies
    • 5.2k views

  25. Bed Mat

    By marpel,
    • 8 replies
    • 5.2k views
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