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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

1,789 topics in this forum

  1. 1” taller tires dually

    By Yehyo,
    • 4 replies
    • 1.8k views

  2. Sierra 3500 4 Pin Trailer Plug

    By CalN,
    • 9 replies
    • 6.8k views

  3. Fuel Filter Relocation

    By inquenciocha,
    • 2 replies
    • 973 views

  4. First towing experience

    By greatmizzou,
    • 14 replies
    • 3k views

  5. Standard Bed 5th Wheel Hitch

    By 2020-2500,
    • 5 replies
    • 16.3k views

  6. USB Infotainment music??

    By dadztoy,
    • 8 replies
    • 23.2k views

  7. No interest

    By Say When,
    • 3 replies
    • 1.1k views

  8. Mud Terrain Tire Option

    By TrailBoss1,
    • 4 replies
    • 3.7k views

  9. 2021 SIlverado 3500HD Allocation and Discounts

    By M Parr,
    • 11 replies
    • 4.4k views

  10. Navigation in HUD question

    By migrabill,
    • 10 replies
    • 15.4k views

  11. Tire pressure threshold TPMS

    By kylant,
    • 2 replies
    • 5.7k views

  12. Metalic Noise 2020 Silverado Custom

    By Clay Colley,
    • 1 reply
    • 988 views

  13. Excessive steam from exhaust

    By greatmizzou,
    • 1 reply
    • 919 views

  14. Is stock exhaust stainless or aluminized??

    By Z1500,
    • 3 replies
    • 11.9k views

  15. duramax battery specs?

    By FirstAscent,
    • 2 replies
    • 25.2k views

  16. Satin Steel Metallic color

    By nolejag15,
    • 4 replies
    • 2.6k views

  17. Colour Matched Wheel Arch Mouldings 1 2 3

    By cdnSpinalTap,
    • 34 replies
    • 33.6k views

  18. what would you buy?

    By ultrascott,
    • 8 replies
    • 1.2k views

  19. Tonneau Cover Help

    By DeadManWalkin,
    • 10 replies
    • 6.9k views

  20. Clunk noises in cabin

    By Pate Services,
    • 5 replies
    • 3.8k views

  21. Help with part numbers for chrome delete

    By paticus,
    • 3 replies
    • 5.8k views

  22. Adding Sub/Amp to bose system?

    By Wigg006,
    • 6 replies
    • 30.6k views

  23. DEF stability question for newbie

    By Njmurvin,
    • 3 replies
    • 973 views

  24. 2020 2500 sidesteps

    By Newduramaxh*ar,
    • 6 replies
    • 2.9k views

  25. B&W Stow and Tow clearance with Multi Pro Tailgate

    By paticus,
    • 2 replies
    • 1.9k views

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