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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. 2024 Silverado HD headlights

    By JReed32,
    • 7 replies
    • 5.1k views

  2. An oblong hitch hole 1 2

    By Jettech1,
    • 28 replies
    • 4.2k views

  3. 2023 Denali Electrical Problems

    By PJO,
    • 0 replies
    • 1.6k views
    • PJO
    • PJO

  4. Disable Amber Cab Lights 1 2

    By JTRACKER,
    • 21 replies
    • 24.5k views

  5. And we're back after a 3 week vacation towing our camper 3300 miles with our 22 gasser to Maine from Alabama! 1 2 3

    By Jettech1,
    • 41 replies
    • 3.7k views

  6. 13.4” Infotainment Satellite View

    By Richard C. Romero,
    • 3 replies
    • 11.3k views

  7. Preparing to buy: What did you pay for your 2024 Duramax AT4 or SLT

    By Mike Ruff,
    • 8 replies
    • 4k views

  8. Rear air conditioner vent

    By Deta Bo,
    • 3 replies
    • 6.6k views

  9. Carfax

    By marpel,
    • 2 replies
    • 741 views

  10. Struggling to decide on gas vs diesel for a 14k 37' 5er 1 2 3

    By namtaru,
    • 36 replies
    • 11.4k views

  11. Any RustProofing, Underbody coating experience or thoughts? 1 2 3

    By Leonardo Willi,
    • 30 replies
    • 17.8k views

  12. Just received notice of GM Update N23-241156

    By CRApex,
    • 12 replies
    • 10.6k views

  13. No More Z71 Sport Package?? 1 2 3

    By AngelPhoenix,
    • 36 replies
    • 9.2k views

  14. Flint or Oshawa 1 2

    By skorpyd,
    • 17 replies
    • 10.6k views

  15. Anyone have the inside info on ordering a truck?

    By LEC2008,
    • 8 replies
    • 1.4k views

  16. 24 sierra hd text notifications

    By blairw,
    • 2 replies
    • 7.6k views

  17. 2024 GMC Sierra Startup Graphic Animation

    By athompson99,
    • 2 replies
    • 7.6k views

  18. Switching brands 1 2

    By pioneer 1,
    • 23 replies
    • 3.7k views

  19. Safety Issue Type: Recall 2024 Silverado/Sierra 2500/3500 HD

    By 2Ranchers,
    • 2 replies
    • 4.7k views

  20. 1300 miles towing our camper 1 2

    By Jettech1,
    • 16 replies
    • 2.5k views

  21. New lakeshore blue

    By Agargano98,
    • 12 replies
    • 12.5k views

  22. 2023 GMC Serria Denali Vanity Lights

    By jrryc,
    • 2 replies
    • 1.5k views

  23. 9L7 UPFITTER SWITCH KIT '23+ Info, Also Rear Camera with a Bed Cap (or silde in camper).

    By Kerry Pulaski,
    • 1 reply
    • 4.4k views

  24. 2021 AT4 Wi-Fi interference / Apple Carplay issues 1 2

    By Dbark,
    • 20 replies
    • 25.9k views

  25. Oil Consumption 1 2 3 4 5

    By Jettech1,
    • 60 replies
    • 26.1k views
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