Troubleshooting, Warranty & Recalls

3,465 topics in this forum

1. Shift to park message after shut down. 1 2 3 4 6

   By Unclebud87, June 3, 2020
   • 87 replies
   • 215.3k views
   • 
   • amoses
   • August 12, 2025

2. DPF Clean on a LM2 3.0 Duramax?

   By cautious optimist, August 11, 2025
   • 5 replies
   • 2.7k views
   • 
   • Silverado4x4
   • August 12, 2025

3. Door handle button won't unlock truck 1 2

   By wurgs, August 13, 2022
   • 20 replies
   • 149.7k views
   • 
   • dieselfan1
   • August 10, 2025

4. Suspension Creaks on '21 Denali with Adaptive Ride Control

   By tjonesdfw, August 6, 2025
   • 1 reply
   • 439 views
   • 
   • GMCustomerService
   • August 7, 2025

5. Video to Front Seat - How

   By rrmccabe, July 31, 2025
   • 6 replies
   • 1.9k views
   • 
   • rrmccabe
   • August 4, 2025

6. Truck stuck in service mode

   By htex88, July 13, 2025
   • 3 replies
   • 1.3k views
   • 
   • 2016 Sierra Owner
   • July 22, 2025

7. Wet mildew smell in truck and camera failure; possible rear window leak again after TSB repair?

   By tjonesdfw, July 14, 2025
   • 2 replies
   • 655 views
   • 
   • 2016 Sierra Owner
   • July 22, 2025

8. 22 LM2 - P2ADA Code - Warranty (Yea or Nay?)

   By parthery, July 14, 2025
   • 3 replies
   • 1k views
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   • parthery
   • July 21, 2025

9. “Service transmission Now, unable to shift soon” Message 1 2

   By BigE_N_TX, January 14, 2024
   • 27 replies
   • 63.2k views
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   • Tom73
   • July 19, 2025

10. Valvoline Wouldn't Change My Oil

    By reeseb, July 4, 2025
    • 4 replies
    • 1.5k views
    • 
    • BIGDOGx
    • July 18, 2025

11. 2024 Denali - Trailer Brake/Brake Gain Not Recalled

    By McIrish, June 5, 2025
    • 4 replies
    • 980 views
    • 
    • McIrish
    • July 15, 2025

12. Beware of Cold Air Intakes 1 2 3 4 5

    By Red6.2, February 15, 2025
    • 63 replies
    • 14.7k views
    • 
    • DenaliSS
    • July 12, 2025

13. 305-45R22s on OEM wheels?

    By kodiakdenali, June 19, 2025
    • 8 replies
    • 1.7k views
    • 
    • kodiakdenali
    • July 12, 2025

14. DO ANYBODY KNOW THE LOCATION OF ALL GROUND POINTS

    By Fowler, July 8, 2025
    • 4 replies
    • 1.2k views
    • 
    • Fowler
    • July 9, 2025

15. Headlight Harness Wiring-Pin Diagram

    By Silverado22LT, June 26, 2022
    • 9 replies
    • 66.9k views
    • 
    • davester
    • July 4, 2025

16. Integrated trailer brake controller not working

    By RNAV, February 1, 2021
    • 10 replies
    • 56.5k views
    • 
    • SoxFan904
    • June 26, 2025

17. Whistling while driving

    By Mack3748, June 23, 2025
    • 4 replies
    • 713 views
    • 
    • Mario C
    • June 23, 2025

18. New problems after L87 replacement

    By Todd G 22HC, June 22, 2025
    • 2 replies
    • 1k views
    • 
    • silveradosid
    • June 23, 2025

19. Grinding Noise... anyone else noticed it? 1 2

    By aha1987, March 31, 2019
    • 29 replies
    • 36.1k views
    • 
    • silveradosid
    • June 23, 2025

20. Noisy Brake Pedal

    By truck_newbie, August 19, 2019   

    • brake
    • 13 replies
    • 21.4k views
    • 
    • GMCustomerService
    • June 23, 2025

21. 2025 Sierra Denali

    By awh3rgm, December 20, 2024
    • 9 replies
    • 11.9k views
    • 
    • tonzmn
    • June 20, 2025

22. Replacing harness to Brake Pad Life sensor on Passenger Front

    By wacnstac, May 20, 2025
    • 1 reply
    • 1k views
    • 
    • davester
    • June 19, 2025

23. Trailering App won't initialize 1 2

    By jawsmon, August 24, 2022
    • 23 replies
    • 11.8k views
    • 
    • redwngr
    • June 18, 2025

24. Infotainment Trailer App - Not Showing Trailer

    By SoxFan904, June 16, 2025
    • 0 replies
    • 823 views
    • 
    • SoxFan904
    • June 16, 2025

25. Trailer tow wiring

    By Mitchell Gay, February 14, 2020
    • 11 replies
    • 44.9k views
    • 
    • SoxFan904
    • June 16, 2025