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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. Adding LED Running Lights

    By Markday3,
    • 2 replies
    • 10.3k views

  2. Brownstone metallic AT4?! 1 2

    By karam00,
    • 15 replies
    • 18.9k views

  3. Low fuel light

    By ROD123,
    • 4 replies
    • 28.4k views

  4. AT4 Owners: Audio check in please, rear speakers barely audible?

    By KC Desert,
    • 11 replies
    • 6.5k views

  5. When do you think I will get my truck? 1 2

    By migrabill,
    • 26 replies
    • 4.2k views

  6. 2020 Gasser vacuum(sucking) sound in dash drivers side

    By Bones454,
    • 2 replies
    • 1.5k views

  7. Transmission Shift Solenoid failure

    By Peter Fagan,
    • 1 reply
    • 4.1k views

  8. How far out did the strike really push new builds? 1 2 3

    By BBE,
    • 31 replies
    • 3.1k views

  9. has anyone heard about there being a constraint on the gas engine?? 1 2

    By BBE,
    • 16 replies
    • 3.2k views

  10. How Much Of The Silverado Body Is Shared With 1500's?

    By 24v,
    • 11 replies
    • 2.1k views

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

    By Zane,   
    • 10 replies
    • 5.3k views

  12. Just picked up a new Denali duramax sweet deal! 1 2

    By bass mechanic,
    • 22 replies
    • 5.9k views

  13. New trucks in transit hanging over a cliff!

    By SkidooSteve12,
    • 3 replies
    • 1.2k views

  14. Grades LT and below steering. Vs LTZ and above variable steering?

    By Akwagon,
    • 0 replies
    • 936 views

  15. ways to get a good deal 1 2

    By Rory Blaze,
    • 20 replies
    • 8.3k views

  16. 2020 Sierra 2500 HD Duramax vs. Ford F-250 w/ 6.7

    By OmahaBen,
    • 10 replies
    • 16.6k views

  17. Snow plow wiring through firewall

    By Kyle4646,
    • 2 replies
    • 13.7k views

  18. Infortainment Center Lock up

    By Craig Pell,
    • 1 reply
    • 746 views

  19. Trade my 2020 3500HD LTZ Chrome parts for your Black work truck parts.

    By bizasuge,
    • 0 replies
    • 618 views

  20. "Minor technology enhancements" for 2021 1 2

    By bharris515,
    • 15 replies
    • 2.5k views

  21. 6.6 Gas Tows 16K Review Video 1 2

    By brendon444,
    • 24 replies
    • 9.9k views

  22. Active Aero Shutters

    By ShotgunZ71,
    • 1 reply
    • 1.4k views

  23. Picked up '20 Denali 2500HD-Review 1 2 3 4

    By Shawn T,
    • 56 replies
    • 10.9k views

  24. Plastic Caps Inside Rear Corners Of Bed On 2500HD Custom?

    By 24v,
    • 2 replies
    • 3k views
    • 24v
    • 24v

  25. SLT vs SLE Options

    By GPR,
    • 11 replies
    • 6.4k views

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