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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. L5P Winter grill cover

    By Diver6,
    • 2 replies
    • 9.1k views

  2. Lifter Issues

    By D Ennis,
    • 9 replies
    • 16k views

  3. Trade in value 1 2

    By smokeyburnout,
    • 20 replies
    • 5.2k views

  4. Noisy transfer case in 4Hi-2018 2500HD GMC Gas 1 2

    By rtreptow7,
    • 15 replies
    • 10k views

  5. Whistling Noise 1 2 3 4 6

    By smith462,
    • 82 replies
    • 63.1k views

  6. 2015 GMC Denali Driverside Daytime running lights not working

    By JoeyCreech,   
    • 12 replies
    • 28.6k views

  7. 2015 HD SLT Radio Nav Cycles On & Off

    By Cosmic Charlie,
    • 1 reply
    • 1k views

  8. Max Tire size on a Stock Height 2015 2500HD 1 2 3 4 9

    By bigsby,
    • 125 replies
    • 362.9k views

  9. Center Console Question

    By HallettMan,
    • 9 replies
    • 2.1k views

  10. 6.0 Block heater 1 2

    By GTBensley,
    • 19 replies
    • 4.2k views

  11. 2019 Silverado Midnight Edition LTZ stock mirrors?

    By Larry Brigden,
    • 4 replies
    • 1.3k views

  12. towing from the front

    By Tujal,
    • 4 replies
    • 1.5k views

  13. 2019 2500HD Duramax Towing Fuel Economy

    By vranasaurus,
    • 6 replies
    • 11.2k views

  14. Leak!! HELP ME!

    By Juicy-J,
    • 6 replies
    • 1.5k views

  15. Silverado 3500HD garage fit?

    By Lspoo19,
    • 1 reply
    • 1.3k views

  16. 5th Wheel Towing Capacity seems really low on some 2500's 1 2

    By Ron Myers,
    • 26 replies
    • 13.4k views

  17. 2016 2500 Tow Mirror moves on its own.

    By Offcamber,
    • 11 replies
    • 9.1k views

  18. Used 3/4 ton gassers...

    By today14,
    • 6 replies
    • 2.5k views

  19. Heavy tow on gas motor 1 2

    By cmysstailights,
    • 26 replies
    • 4.1k views

  20. running board differences-gas vs diesel Crew cab

    By Revspan,
    • 3 replies
    • 5.7k views

  21. Good price or bad

    By cmysstailights,
    • 14 replies
    • 1.9k views

  22. Duramax cold weather starts

    By HiggySTL,
    • 14 replies
    • 44.6k views

  23. What size jump starter for 2500 HD (Diesel)?

    By rustyangel,
    • 8 replies
    • 14.5k views

  24. GM leather seats

    By Byron Sparrow,   
    • 4 replies
    • 6.8k views

  25. Cup holders

    By almondted,
    • 10 replies
    • 20.8k views
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