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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.

    5.4k
    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. First diesel truck - transmission behavior question

    By jj46,
    • 5 replies
    • 1.2k views
    • jj46
    • jj46

  2. 2017 Gauge Cluster Reprogram

    By Mcrabtree,
    • 3 replies
    • 6.9k views

  3. New brake pads 1 2 3 4

    By bcazier,
    • 58 replies
    • 8.8k views

  4. How to stop the disclaimer when truck is started

    By rv7plt,
    • 11 replies
    • 1.8k views

  5. New (used) wheels, have questions/need help...

    By 6.Ohh,
    • 10 replies
    • 1.8k views

  6. 2015 to 2017 2500hd

    By RJP44,
    • 11 replies
    • 5.7k views

  7. Wheel back spacing

    By Tcholt,
    • 2 replies
    • 1.3k views

  8. Cant Order Roof Markers on 2018 GMC Sierra 2500HD 6.6L Denali (CA Emis 1 2

    By 4jj,   
    • 22 replies
    • 11.5k views

  9. Bumper Fix or Replace

    By BowtieFever17,
    • 1 reply
    • 860 views

  10. Rock Chips 1 2 3

    By Skeld,
    • 36 replies
    • 12.8k views

  11. Changing "user" on Key Fob

    By JoeM21,
    • 6 replies
    • 12.9k views

  12. Cruising Speed 1 2 3 4 6

    By Buckshot556,
    • 85 replies
    • 11.5k views

  13. 2016 Sierra IOB Radio Camera Upgrade

    By MADMAG486,   
    • 4 replies
    • 4.4k views

  14. Factory window tint

    By Doug Rosewood,
    • 4 replies
    • 2.7k views

  15. how to reset voice recognition?

    By jerseydrew,
    • 5 replies
    • 35.7k views

  16. All Terrain Package Cooled Seats. WHY NOT GM?????? 1 2 3

    By HammerDownProductions,
    • 39 replies
    • 14.7k views

  17. 2017 AC fan controll

    By OsageZ71,
    • 2 replies
    • 1.1k views

  18. What Differential Do I Have??

    By MotionMan,
    • 13 replies
    • 11.3k views

  19. Off-road suspension flex

    By Doug Rosewood,
    • 11 replies
    • 2.4k views

  20. Beat to death mirror wiring....

    By Chango42,   
    • 3 replies
    • 1.5k views

  21. Easy out seat feature adjustment?

    By Marc Russ,
    • 1 reply
    • 1.4k views

  22. Mirror help

    By nibroc92,
    • 5 replies
    • 1.4k views

  23. Is this normal?

    By Doug Rosewood,
    • 10 replies
    • 2.2k views

  24. Better dealer prices - 2500 or 3500 srw in KY

    By HammerDownProductions,
    • 11 replies
    • 1.5k views

  25. gear ratio?

    By T_ClarkEx39,
    • 6 replies
    • 40.7k views

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