Jump to content

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. Trailer plug spring loaded cover

    By DbMaddog,
    • 1 reply
    • 962 views

  2. Winter driving 1 2

    By gregus73,
    • 18 replies
    • 8.4k views

  3. Bed Mat

    By marpel,
    • 8 replies
    • 5.5k views

  4. Off road bumper and winch install

    By john lawrence,
    • 6 replies
    • 5.2k views

  5. 2022 GMC Sierra 3500HD fuse box

    By Sachinb,
    • 14 replies
    • 46.4k views

  6. 2025 HD Trail Boss

    By Bloody Marty,
    • 9 replies
    • 9.8k views

  7. Advertising

    By arundelglass,
    • 12 replies
    • 1.2k views

  8. The new truck is here

    By littleal,
    • 8 replies
    • 1.8k views

  9. Is this the air filter for the 6.6 gas?

    By Pryme,
    • 3 replies
    • 2.6k views

  10. 2020 6.6L Gasser dyno pull 1 2

    By BoilerUP,
    • 22 replies
    • 42.7k views

  11. 2023 Silverado 2500HD Custom - Steering Wheel Upgrade 1 2

    By lmullenaux,
    • 16 replies
    • 21.1k views

  12. 2020 Silverado 2500 "Idle vehicle to cool engine" message

    By Liz Mosbey,
    • 10 replies
    • 20.4k views

  13. I have the dealer supplied Auxiliary switch upfitter package - how to get through the firewall on a 2024 3500 HD gas engine truck? 1 2 3 4

    By Doug Krussel,
    • 49 replies
    • 60.2k views

  14. Test drove a 2024 AT4X gasser

    By 453030,
    • 13 replies
    • 6.9k views

  15. New to GM diesel 1 2

    By Mike Weinandy,
    • 18 replies
    • 4k views

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

    By Jettech1,
    • 30 replies
    • 5.6k views

  17. Need a comparison on Airbags - Firestone, Airlift and ReadyLift AirIQ

    By chopjaw,
    • 1 reply
    • 5k views

  18. Air chuck/ tire gauge

    By Mike Weinandy,
    • 9 replies
    • 1.7k views

  19. Questions: Plowing with an AT4 - Dual alternator, auxiliary battery, hood scoop

    By thewholetruth,
    • 4 replies
    • 2.7k views

  20. 2024 GMC DENALI ULTIMATE HALF TON PICK UP

    By Hobuck2000,
    • 5 replies
    • 2.4k views

  21. Looking for a mid rise truck cap for 2024 Chevy/ GMC short bed with multi flex tailgate.

    By Agahoe,
    • 8 replies
    • 8k views

  22. Tire pressures 1 2

    By rjgvt,
    • 18 replies
    • 28.4k views

  23. Downpour Metallic not available on specific Trims

    By Red Hawk,
    • 1 reply
    • 2.2k views

  24. Leveling a 2020 Sierra 1500 Elevation

    By Roxbury5,
    • 5 replies
    • 1.6k views

  25. GM HD DISCOUNTS

    By littleal,
    • 6 replies
    • 3.1k views
×
×
  • Create New...