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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. standard bed floor flatness

    By GmEnjoyer,
    • 8 replies
    • 1k views

  2. Cost of mid tailgate for multipro?

    By SuperDuper,
    • 14 replies
    • 21.3k views

  3. Do you have keyless entry buttons on rear doors? 1 2 3 4

    By jeetS,
    • 47 replies
    • 18.5k views

  4. I have a short my trailering camera system wire.

    By Sean2k5,
    • 0 replies
    • 770 views

  5. Turn Off Grade Breaking 2024 HD+++

    By kevin christensen,
    • 4 replies
    • 11k views

  6. Grease zerks “dry” 1 2 3

    By WV_Crusader,
    • 33 replies
    • 28.4k views

  7. GMC Accessories

    By Lester Bowen,
    • 2 replies
    • 3.3k views

  8. Do older trailer TPMS sensors connect to the trailering app on 2024 trucks?

    By namtaru,
    • 8 replies
    • 5.2k views

  9. Window switch

    By Texas1836,
    • 3 replies
    • 4.5k views

  10. AT4 HD Floor Mats

    By Nick McDermott,
    • 13 replies
    • 6.1k views

  11. 2021 L5P 10 Speed Alliston Starting off in 2nd Gear

    By Tauro_Z71,
    • 5 replies
    • 4k views

  12. Rear end gears

    By Chfc2,
    • 5 replies
    • 22.1k views

  13. 2024 2500HD ZR2s 1 2

    By Basketcase,
    • 26 replies
    • 4.6k views

  14. Looking for torque values

    By Agargano98,
    • 2 replies
    • 996 views

  15. Keep tailgate down without the cables?

    By SierraCamper,
    • 5 replies
    • 4.2k views

  16. Difference btwn 2500HD and 3500HD SRW 1 2 3 4

    By Moyses,
    • 53 replies
    • 52.6k views

  17. Is the strike going to affect the HD trucks?

    By Pryme,
    • 12 replies
    • 2.4k views

  18. Finally had the forward collision automatic braking go into action

    By Jettech1,
    • 5 replies
    • 1.5k views

  19. Ordering mods by chat

    By WV_Crusader,
    • 1 reply
    • 1.2k views

  20. WT Floormats

    By rdonarski,
    • 6 replies
    • 1.9k views

  21. 2024 rocker panel paint 1 2 3

    By GmEnjoyer,
    • 37 replies
    • 13.1k views

  22. Z71 Grill badge

    By Moldman,
    • 8 replies
    • 6.8k views

  23. 20” High Gloss Black Aluminum 8 Spoke Wheels, RPO Code Q7N

    By rjgvt,
    • 2 replies
    • 2.8k views

  24. 2021 Chevy Silverado 2500 brake squeaking and roaring

    By Russell Owen,
    • 3 replies
    • 11.3k views

  25. Inner Tailgate

    By Saparkin,
    • 8 replies
    • 2.7k views
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