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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.

    8.8k
    posts

  2. Modifications & Accessories

    Bumper replacements, 5th wheel hitches, auxiliary lighting, and suspension upgrades for your workhorse.

    11k
    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

1,791 topics in this forum

  1. When will they hit the dealer lots???? 1 2 3 4

    By wowens79,
    • 54 replies
    • 10k views

  2. What wheels and tires are you going with?

    By Coolade,
    • 5 replies
    • 8.7k views

  3. Auction price results

    By yamahauler99,
    • 0 replies
    • 690 views

  4. Truck Dimensions

    By redwngr,
    • 12 replies
    • 26.3k views

  5. l5p exhaust tips

    By BB&Chiveon,
    • 4 replies
    • 3.8k views

  6. What do you need for the trailering app

    By Sunshine39,
    • 2 replies
    • 1.1k views

  7. 2020 2500 6.6L gas. How does it drive/compare?

    By RE1,
    • 7 replies
    • 2.9k views

  8. Upfitter Switches location

    By ChevyLee,
    • 5 replies
    • 21.3k views

  9. Train derails with new GMC Sierras & Chevy Silverados

    By ApertureX,   
    • 4 replies
    • 1.6k views

  10. AT4 HD 1 2 3

    By gearheadesw,
    • 40 replies
    • 14.5k views

  11. After Market Fuel Tanks

    By cattledog04,
    • 2 replies
    • 1.1k views

  12. Heavier front springs

    By Cool J,   
    • 3 replies
    • 7.9k views

  13. GMC 2020 HD Build & Price is now LIVE

    By ApertureX,   
    • 3 replies
    • 2.4k views

  14. 2020 inventory in transit (one dealer in Edmonton, Canada)

    By magnum74,   
    • 6 replies
    • 2k views

  15. 2020 is 10k more than 2019 denali

    By Pastusak.t,
    • 3 replies
    • 1.5k views

  16. 2020 Silverado 2500hd 1 2

    By Captainmc,
    • 23 replies
    • 5.8k views

  17. 2020 Silverado HD/Sierra HD Build Thread 1 2 3 4

    By ShotgunZ71,
    • 52 replies
    • 10.3k views

  18. 2020's Almost Here, Good Deals on 2019 Dually

    By Dickson,
    • 4 replies
    • 1.2k views

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

    By Zane,   
    • 35 replies
    • 5.8k views

  20. 6.6 gas 1 2 3 4 9

    By gearheadesw,
    • 132 replies
    • 66.9k views

  21. GMC Has Updated the HD Page with Spec & Some Pricing

    By ApertureX,   
    • 5 replies
    • 1.4k views

  22. Silverado HD Pricing - All Makes

    By ApertureX,   
    • 0 replies
    • 934 views

  23. Build and Price 2020 2500HD

    By CRApex,
    • 1 reply
    • 3.6k views

  24. 2020 wheel offset

    By CRApex,
    • 7 replies
    • 22.9k views

  25. 2020 HD Upfitter Manuals

    By newdude,   
    • 2 replies
    • 2.1k views

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