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Troubleshooting, Warranty & Recalls

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

910 topics in this forum

  1. 3.0 Duramax cranks but won’t start 1 2 3 4 35

    By Dbersuch,
    • 510 replies
    • 187.4k views

  2. 2024 Brake controller Problems 1 2 3 4 16

    By Curt Lowe,
    • 229 replies
    • 104.9k views

  3. Tailgate spontaneously opening 1 2 3 4 13

    By jsward12,
    • 191 replies
    • 121.6k views

  4. Engine knock a 500 miles 1 2 3 4 10

    By bass mechanic,
    • 135 replies
    • 73.5k views

  5. Noisy steering column 1 2 3 4 8

    By STGS,
    • 108 replies
    • 88.9k views
    • Snlk
    • Snlk

  6. 2024 Turn Signals Not Working Properly at Times 1 2 3 4 7

    By jd64,
    • 99 replies
    • 55k views

  7. Brakes Squeaking @ 10K 1 2 3 4 7

    By LarryM,
    • 98 replies
    • 60.4k views

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

    By Andrew Best,   
    • 96 replies
    • 56.1k views

  9. Trailer camera issues 1 2 3 4 7

    By In2racn,
    • 94 replies
    • 42.6k views

  10. Highway speed vibration on 2020? 1 2 3 4 6

    By Ckhris,
    • 77 replies
    • 51.8k views

  11. Trailer Brake Issue 1 2 3 4 5

    By marpel,
    • 71 replies
    • 37.3k views

  12. active aero shutters 1 2 3 4 5

    By H1ghlndr,
    • 67 replies
    • 46.6k views

  13. 2022 High Country HD retractable running board issues 1 2 3 4 5

    By mtbadbob,
    • 66 replies
    • 36.9k views

  14. Trailer lights 1 2 3 4 5

    By Jordan94,   
    • 64 replies
    • 106.8k views

  15. Brake pedal hard to push 1 2 3 4

    By gerald compton,
    • 57 replies
    • 37.2k views

  16. Infotainment Screen Black When Using Remote Start 1 2 3 4

    By smiles,   
    • 57 replies
    • 29.8k views

  17. grease fittings 1 2 3 4

    By Bigbucks10,
    • 53 replies
    • 87.1k views

  18. 2020 2500hd high country door latch noisy 1 2 3 4

    By Paul jackckson,
    • 53 replies
    • 27k views

  19. Belt squeal (?) on cold start up on 2024 Chevy 2500HD 6.6L Gasser 1 2 3 4

    By gastrohman,
    • 51 replies
    • 15.5k views

  20. Leaking rear window 1 2 3 4

    By redpat2061,
    • 50 replies
    • 22.4k views

  21. Rear brakes lasting 22k miles???? 1 2 3 4

    By AbzDad,
    • 49 replies
    • 3.5k views

  22. Tire blowout.. 43K 1 2 3 4

    By LarryM,
    • 48 replies
    • 14.3k views

  23. 2020 2500HD Transmission issues 1 2 3 4

    By gpraceworks,
    • 45 replies
    • 57.6k views

  24. Check engine light 1 2 3

    By bharris515,
    • 44 replies
    • 40.8k views

  25. Factory Manual 1 2 3

    By SSchup,
    • 42 replies
    • 2.3k views

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