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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.

    5.5k
    posts

1,787 topics in this forum

  1. 2020 3500 AT4 1 2 3

    By powerhaulic,
    • 34 replies
    • 6.3k views

  2. Diesel without options or gas with all the options 1 2 3

    By Pastusak.t,
    • 33 replies
    • 4.4k views

  3. It appears Lasfit is now making LED tail lights and reverse lights. I must buy them... 1 2 3

    By Jettech1,
    • 33 replies
    • 5.5k views

  4. New 2024 3500HD Software Update? 1 2 3

    By Rick_,
    • 33 replies
    • 13.6k views

  5. Grease zerks “dry” 1 2 3

    By WV_Crusader,
    • 33 replies
    • 27.4k views

  6. Factory Order vs Dealer Lot 1 2 3

    By D A,
    • 33 replies
    • 7k views

  7. Recent 2500 build timeline 1 2 3

    By Londart2020,
    • 33 replies
    • 8.6k views

  8. '22 3500HD Silverado LT CC/SB L8T First long trip drive impression 1 2 3

    By sheath,
    • 33 replies
    • 8.9k views

  9. Ignition Key wont come out at times. 1 2 3

    By 513Brewer,
    • 32 replies
    • 80.8k views

  10. No 12v Power Outlets 1 2 3

    By UWSkier,
    • 32 replies
    • 72.2k views

  11. Brakes soft 1 2 3

    By nards444,
    • 32 replies
    • 42.2k views

  12. Parking Lot Shenanigans 1 2 3

    By the8rotor,
    • 31 replies
    • 4.7k views

  13. How far out did the strike really push new builds? 1 2 3

    By BBE,
    • 31 replies
    • 3.1k views

  14. Can the 6.6 gas HD hit 20mpg hwy? Got close. 1 2 3

    By Pryme,
    • 31 replies
    • 4.3k views

  15. Just ordered Hope I dont regret it 1 2 3

    By nards444,
    • 31 replies
    • 7k views

  16. OnStar Cost $14.99 Per Month On New Truck 1 2 3

    By unit,
    • 31 replies
    • 9.5k views

  17. Upgrade from 1500 to HD 1 2 3

    By Camario,
    • 31 replies
    • 3.4k views

  18. GM plan larger engine than 6.6 engine gas 1 2 3

    By Damron walton,
    • 31 replies
    • 11.5k views

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

    By Jettech1,
    • 30 replies
    • 5.3k views

  20. 295/65R20 1 2 3

    By bharris515,
    • 30 replies
    • 82.4k views

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

    By Leonardo Willi,
    • 30 replies
    • 17.8k views

  22. Bought a truck camper 1 2 3

    By Hoginedgewood,
    • 30 replies
    • 14.3k views

  23. Dealer cost? 1 2 3

    By skav,
    • 30 replies
    • 22.3k views

  24. Anyone driving a gasser yet? Mileage? 1 2 3

    By jamin87ss,
    • 30 replies
    • 5.9k views

  25. 2024 GMC 3500HD Build Frustrations 1 2 3

    By Nick McDermott,
    • 30 replies
    • 5.4k views
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