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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. Service Steering Column Message

    By Tville,   
    • 2 replies
    • 11.2k views

  2. Payload

    By mbsfgts,
    • 10 replies
    • 7.6k views

  3. VIM adapter + WiFi on all the time

    By Andrew L,
    • 2 replies
    • 1.4k views

  4. Anyone driving a gasser yet? Mileage? 1 2 3

    By jamin87ss,
    • 30 replies
    • 5.9k views

  5. 2020 Denali HD Weather App

    By MrGraff,
    • 2 replies
    • 6.1k views

  6. Dealer cost? 1 2 3

    By skav,
    • 30 replies
    • 22.3k views

  7. 6.6 gas exhaust

    By Blkmgc,
    • 3 replies
    • 15.1k views

  8. 2020 Silverado 6.6 Gas LT / Heated Side Mirrors?

    By AlexMartin,
    • 3 replies
    • 12.5k views

  9. Drivability of 6.6L gas 2500 vs 6.2L 1500 1 2 3 4 6

    By RE1,
    • 83 replies
    • 121.2k views

  10. Waiting for a new truck?

    By Z45,
    • 8 replies
    • 1.1k views

  11. mpg report after 4000 miles

    By Irish80,
    • 10 replies
    • 2.3k views

  12. Tare weight

    By jl449,
    • 6 replies
    • 1.3k views

  13. 24 Hours With a 2020 Silveado HD (T1) 1 2

    By newdude,   
    • 15 replies
    • 5.2k views

  14. GMC 2500HD Sierra, SLE and SLT Build and Price Web Page Up

    By bullet225ho,
    • 5 replies
    • 1.1k views

  15. Door Assist Wire

    By Coolade,
    • 3 replies
    • 3.5k views

  16. 2020 - 2019 GMC Side by Side 1 2

    By MrChips,
    • 24 replies
    • 6.8k views

  17. 2020 3500hd double cab???

    By kingscote lake,
    • 3 replies
    • 1.2k views

  18. Car Lot To Dealer

    By cattledog04,
    • 3 replies
    • 992 views

  19. Pic request

    By sdelam,
    • 4 replies
    • 1.2k views

  20. 2020 3500 dually tail light lenses

    By Pfc1,
    • 7 replies
    • 5.4k views

  21. Any Body Looked at Building An SLE?

    By bullet225ho,
    • 7 replies
    • 1.2k views

  22. 2.5" Receiver

    By Chrisw253,
    • 13 replies
    • 23.9k views

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

    By protovack,
    • 43 replies
    • 34.2k views

  24. 2020 3500 AT4 1 2 3

    By powerhaulic,
    • 34 replies
    • 6.3k views

  25. Any dealers out there with 2020 Chevrolet 3500 HD with Duramax and long bed DRW ?

    By Jim Thompson,
    • 5 replies
    • 1.2k views

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