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2015-2019 Silverado HD, Sierra HD & Medium Duty

The heavy haulers. Discussion for the 2500HD / 3500HD and the 4500HD / 5500HD / 6500HD chassis cabs.

Subforums

  1. Modifications & Accessories

    Bumpers, towing mirrors, and suspension upgrades.

    10.3k
    posts

  2. Troubleshooting & Recalls

    Diagnose DEF heater failures, CP4 pumps, and electrical issues.

    5.5k
    posts

  3. Engines & Powertrain (Duramax & Vortec)

    Technical discussion for the 6.6L Duramax (LML / L5P) and the 6.0L Gas V8 (L96 / LC8). Covers the Allison 1000 and 6L90 transmissions.

    2.8k
    posts

1,665 topics in this forum

  1. Vibration

    By JojoGMCHELP,
    • 0 replies
    • 1.3k views

  2. Gear Indicator 1 2

    By Makkat,
    • 20 replies
    • 23.9k views

  3. 2016 3500 Silverado steering wobble when braking

    By Ken Terry,
    • 5 replies
    • 8.3k views

  4. DEF Capacity & Refill Question

    By Icutmetl,
    • 9 replies
    • 102.5k views

  5. Front Suspension Torque Specs?

    By CuzznVinny,
    • 7 replies
    • 113.9k views

  6. Wifi Hotspot on while Truck is off? 1 2 3 4

    By Chris Schultz,
    • 53 replies
    • 114.5k views

  7. 6.0 engines

    By Ryan Digman,
    • 7 replies
    • 3.1k views

  8. Tow hitch weight

    By AbzDad,
    • 5 replies
    • 11.8k views

  9. 6.0 with 6-speed / 4.10 gear rpm

    By Sirspeedy,
    • 13 replies
    • 24.5k views

  10. How to figure out tunes on my truck?

    By Cain Pierce,
    • 0 replies
    • 1.3k views

  11. 2021 chevy 6500hd parts

    By Garry Martin,
    • 2 replies
    • 4.4k views

  12. Smaller DEF Tank

    By Michael Petty,
    • 2 replies
    • 3k views

  13. Intermittent extreme wobble 2015 3500 duelly 1 2

    By Todd1312,
    • 26 replies
    • 34.2k views

  14. Flat Towing

    By SteveE,
    • 2 replies
    • 8.1k views

  15. 2021 chevy 4500 4x4

    By So-flo-79,
    • 0 replies
    • 2.2k views

  16. just replace the def heater in a 2015 gmc 2500 duramax and codes are popping up

    By Kdub1961,
    • 2 replies
    • 3.5k views

  17. looking for the chmsl wire on a 16 2500hd

    By GlenS,
    • 7 replies
    • 26.6k views

  18. USB ports

    By Chebbyfan,
    • 0 replies
    • 1.5k views

  19. is this acurite to the real 3500HD's capacity? (i dont know because im 13 and never owned any type of road legal vehicle)

    By hotwheelsguy69,
    • 4 replies
    • 1.7k views

  20. Looking for some input on if it's worth it

    By SugeDay,
    • 3 replies
    • 1.6k views

  21. Neutral for HD transfer case 1 2

    By rocnrol,
    • 22 replies
    • 28k views

  22. 6.6 gas swap 1 2

    By Chebbyfan,
    • 17 replies
    • 22.5k views

  23. Transmission fluid/filter replacement

    By Run_it,
    • 2 replies
    • 2.2k views

  24. Which is the better purchase? Silverado 1500 or 2500

    By TheSJHL,
    • 5 replies
    • 2.9k views

  25. Vin number on engine block

    By blackdog76,
    • 2 replies
    • 14.7k views

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