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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. 2015 gmc dmax oil leak and issues

    By alex2929,
    • 2 replies
    • 4.4k views

  2. 6.0 vs 5.3

    By bigdeer1,
    • 13 replies
    • 62.5k views

  3. 2016 Android Auto Update

    By Tattooo,
    • 12 replies
    • 7k views

  4. Black spots on drivers side mirror

    By Paulismydog,
    • 2 replies
    • 1.1k views

  5. Gauges fluctuating & various warning lights****

    By grumps91331,
    • 1 reply
    • 928 views

  6. Headlights on 2015+ 2500HD update kit? 1 2 3 4 7

    By fjtort2,
    • 92 replies
    • 96.3k views

  7. Took Delivery today

    By SgtSpeed,
    • 10 replies
    • 2.4k views

  8. 2016 GMC 2500 lifted police chase

    By smcgillis10,
    • 5 replies
    • 3.7k views

  9. So I went to buy new tires....

    By Rufus28,
    • 13 replies
    • 3.2k views

  10. New to Forum and New Sierra 2500HD All Terrain

    By shigeru,
    • 0 replies
    • 1.1k views

  11. New here and this seemed to be the best place to post

    By 99G-Mac,
    • 12 replies
    • 1.6k views

  12. New 2016 GMC SIERRA SLT 1 2

    By Grumpy Tooch,
    • 25 replies
    • 4.9k views

  13. Diamond plate bed caps for 2015/2016 2500hd?

    By AML,
    • 4 replies
    • 1.8k views
    • AML
    • AML

  14. WIFI hotspot 1 2

    By mkilburn9,
    • 17 replies
    • 14.7k views

  15. SoCal Meet May 7 2016 @ Castaic

    By Spurshot,
    • 0 replies
    • 3.5k views

  16. Made the switch to a 2500 SLT

    By shmelty,
    • 7 replies
    • 3.3k views

  17. My poor DIRTY truck

    By North16HighCountryDuramax,
    • 6 replies
    • 2.1k views

  18. how to front marker/turn signal bulb 2015 gmc?

    By Sailfishlaux,
    • 1 reply
    • 12.5k views

  19. RV plug dead on brand-new truck

    By stampeder,
    • 9 replies
    • 4.1k views

  20. Rookie Nav question

    By Doug64,
    • 11 replies
    • 2k views

  21. Fog Lights on my 2015 Sierra 2500 Denali Wont turn on

    By jjcastillo210,
    • 7 replies
    • 9.5k views

  22. Drop hitch

    By Canadiankid,
    • 8 replies
    • 6.1k views

  23. Too Hot Too Cold HD Denali 1 2 3

    By 2TrakR,
    • 31 replies
    • 9.2k views

  24. Running Boards for 2015 2500HD

    By Ltorton255,
    • 8 replies
    • 10.6k views

  25. Test drive

    By Swinepartner,
    • 4 replies
    • 1.6k views
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