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Troubleshooting, Warranty & Recalls

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

912 topics in this forum

  1. Multi-Pro Tailgate Loose?

    By RugbyRef,
    • 5 replies
    • 9k views

  2. Text messages read aloud.

    By Grjfer,
    • 5 replies
    • 15.2k views

  3. Limited Waze functionality in Android Auto

    By Railroad_Jim,
    • 3 replies
    • 2.5k views

  4. Rear View Mirror Issue

    By Robert Corsentino,
    • 1 reply
    • 2k views

  5. Code reader for dummies

    By Sher715,
    • 1 reply
    • 5.1k views

  6. Any 2020 models pulling left? 1 2 3

    By KC Desert,
    • 40 replies
    • 24.1k views

  7. Catalytic converter water

    By Chad23jl,
    • 4 replies
    • 1.1k views

  8. Possible Fluid leak

    By bowtie2007,
    • 4 replies
    • 3.4k views

  9. Please help CAI

    By tn819422,
    • 8 replies
    • 1.4k views

  10. Need help removing and installing tailgate cap on a '21 AT4

    By GMC4Zee,
    • 1 reply
    • 12k views

  11. Clunk from Transfer Case

    By Tshock,
    • 3 replies
    • 3.3k views

  12. Head Up Display Fuzzy

    By acm2020Denali,   
    • 3 replies
    • 8.8k views

  13. Password confirmation?

    By Limelight,
    • 5 replies
    • 8.8k views

  14. axle tube leak at diff

    By kylant,
    • 4 replies
    • 2.9k views

  15. Manual Mode or ERS question

    By Tim Mayeux,
    • 2 replies
    • 5.7k views

  16. Check trailer brakes

    By Buster#1,
    • 1 reply
    • 839 views

  17. 360 camera misalignment

    By Brougham96,
    • 2 replies
    • 3.4k views

  18. Lane Departure Warning

    By Paul-W4END,
    • 8 replies
    • 2.3k views

  19. Tailgate wiring harness quick disconnect

    By James K,
    • 2 replies
    • 15.9k views

  20. Aux power limit

    By Bob 5th Wheel,
    • 4 replies
    • 1.4k views

  21. Re-Learn TPMS Sensors after tire rotation

    By Randy_Smith,
    • 6 replies
    • 40.4k views

  22. New truck need hitch ball for 5th wheel prep

    By GMC4Zee,
    • 6 replies
    • 2.1k views

  23. Back Up Camera

    By CT Chevy Connoisseur,
    • 3 replies
    • 989 views

  24. New Infotainment System Update v148 / Radio won't shut off issue 1 2

    By SkidooSteve12,
    • 16 replies
    • 54.7k views

  25. Truck shuts off after 1 hour while parked.

    By Mi99z71,
    • 10 replies
    • 28.8k views

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