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Troubleshooting, Warranty & Recalls

The repair shop. Diagnose emissions codes, electrical issues, Allison transmission behavior, and recall updates.

918 topics in this forum

  1. Rampant rust brand new truck.

    By disappointed Duramax,
    • 4 replies
    • 1.2k views

  2. Fuel Gauge pegged at full

    By Chaser777,
    • 14 replies
    • 6.4k views

  3. 2024 Sierra 2500HD assist steps and cameras not working

    By Bobby Hill 702,
    • 0 replies
    • 368 views

  4. Recall today

    By typhoon186,
    • 1 reply
    • 1.1k views

  5. 2023 Sierra 2500 HD Electrical Issues

    By Magnolia Mama,
    • 2 replies
    • 917 views

  6. CarPlay calls issue on 2025 HD

    By euromade,
    • 5 replies
    • 1.4k views

  7. 2023 duramax 2500 shift flare

    By Deadstockpomp,
    • 3 replies
    • 1.2k views

  8. Tires Rubbing

    By Wmwbutler,
    • 1 reply
    • 1.2k views

  9. Service Parking Brake Light on

    By B Hayes,
    • 7 replies
    • 2.2k views

  10. Brake Fluid Bleeding....Vacuum vs Pressure?

    By SoCal Angler,
    • 12 replies
    • 3.4k views

  11. Front Suspension and Chassis Lubrication - # of Zircs, Best Grease Gun, and OEM Grease for Lubing? 1 2

    By SoCal Angler,
    • 17 replies
    • 19.1k views

  12. SiriusXM Connection Issue

    By bruceb58,
    • 3 replies
    • 743 views

  13. High-pitched noise when accelerating/decelerating at low RPMs (2024 Silverado 2500)

    By switters,
    • 4 replies
    • 3.5k views

  14. Buy Back Program Experiences

    By DBaker,
    • 0 replies
    • 646 views

  15. 2024 GMC Denali Ultimate Duramax 10 speed with shudder

    By JCraven,
    • 10 replies
    • 14.9k views

  16. 4WD Engagement / Break-In - First Time Owner, Education Needed 1 2 3

    By SoCal Angler,
    • 32 replies
    • 4.8k views

  17. Trailering app defaults to "Guest trailer"

    By Brummie99,
    • 2 replies
    • 1.1k views

  18. Cold Start Whining Horn Like Noise Comes and Goes? -with video/sound clip 1 2 3

    By Group_er,
    • 30 replies
    • 18k views

  19. 2021 6.6 Duramax service DEF system and service power steering warnings

    By jasonhooker3,
    • 4 replies
    • 3.2k views

  20. Pop/clunk

    By 22 6.6gasser,
    • 0 replies
    • 662 views

  21. 2020 3500 outside thermometer not even close

    By bodenwell,
    • 3 replies
    • 650 views

  22. STRANGE "GROWLING" NOISE AND VIBRATING AT ACCELERATION 1 2

    By Oostenstein,
    • 16 replies
    • 34k views

  23. Multi-Pro Tailgate Recall - GM Repair Performed 1 2

    By SoCal Angler,
    • 24 replies
    • 10.2k views

  24. Trailer TPMS sensors loose signal 1 2 3 4 7

    By Andrew Best,   
    • 96 replies
    • 57.1k views

  25. Hands free no workie

    By madweazl,
    • 6 replies
    • 7.8k views
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