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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. Is anybody using the "Add-On Wireless Camera For IntelliHaul 2.0 Systems by EchoMaster"?

    By loghead,
    • 4 replies
    • 6.5k views

  2. Adaptive Cruise and brake lights

    By CRApex,
    • 6 replies
    • 3.6k views

  3. BFG KO3 on 24 HDs

    By ssgballistics,
    • 9 replies
    • 10k views

  4. Anyone looking for a 2024 GMC 3500HD DRW SLT with everything optioned LMK

    By KC Desert,
    • 0 replies
    • 1.1k views

  5. HELP! Need Exact Dimensions of a 2024 HD 8' Bed for Custom Cap

    By Blairware,
    • 5 replies
    • 6.2k views

  6. Bought a truck camper 1 2 3

    By Hoginedgewood,
    • 30 replies
    • 14.3k views

  7. Tire air pressure when towing ...

    By Tucson Jack,
    • 8 replies
    • 9k views

  8. "Locking out" gears...

    By memilanuk,
    • 7 replies
    • 10.9k views

  9. My black beauty beast finally saw it's direct relative yesterday.

    By Jettech1,
    • 3 replies
    • 993 views

  10. Elevated idle 24 L5P

    By Crazy Canuck,
    • 0 replies
    • 1.4k views

  11. Observation using cruise while towing 1 2

    By Sonders,
    • 18 replies
    • 4.7k views

  12. Upgrading Suspension

    By Steve Hougham,
    • 3 replies
    • 9.1k views

  13. Picked up my 2024 Denali 3500 :)

    By nitro882,
    • 10 replies
    • 2.3k views

  14. Heated Steering Wheel

    By marpel,
    • 4 replies
    • 8k views

  15. Kissed a moose last night 1 2

    By Cheekster96,
    • 15 replies
    • 3k views

  16. 2024 trailer tpms add on

    By Agargano98,
    • 2 replies
    • 1.2k views

  17. New Purchase Advice

    By tidewaterjoe,
    • 14 replies
    • 1.8k views

  18. ZR2 2500

    By AngelPhoenix,
    • 6 replies
    • 1.6k views

  19. Stiff turn signal lever?

    By BuckWallace,
    • 5 replies
    • 5.2k views

  20. My retirement truck got more expensive

    By Fishfighter,
    • 13 replies
    • 2k views

  21. How about new tread for 2024 GM Heavy Duty?

    By Swamp rat,
    • 7 replies
    • 1.6k views

  22. Is a Snowplow Package a Stiffer Ride? 2024 GMC Sierra HD2500 Denali Ultimate 1 2 3

    By Ray@Paula,
    • 41 replies
    • 19.3k views

  23. Engine type

    By gemarsh,
    • 4 replies
    • 949 views

  24. Transparent Trailer 1 2 3

    By cNate,
    • 39 replies
    • 25.9k views

  25. For those that use your trucks for towing campers, what are your plans for this year? 1 2 3 4

    By Jettech1,
    • 54 replies
    • 6k views
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