Troubleshooting, Warranty & Recalls

911 topics in this forum

1. No rear parking lights (Wiring diagram request)

   By MFranco, April 6, 2022
   • 4 replies
   • 15.1k views
   • 
   • MFranco
   • April 6, 2022

2. Cargo Light - simple fix or another missing function

   By Jason Caswell, June 17, 2020   

   • cargo light
   • 2500
   • (and 1 more)

     Tagged with:

     • cargo light
     • 2500
     • 2020
   • 6 replies
   • 14.7k views
   • 
   • carkhz316
   • January 8, 2024

3. 2020 GMC AT4 - No power to anything

   By Kyle K, November 29, 2020
   • 6 replies
   • 14.7k views
   • 
   • R Adams
   • October 26, 2021

4. HUD Not showing posted speed limit

   By -MOOSE-, December 11, 2020
   • 5 replies
   • 14.6k views
   • 
   • sdelam
   • December 14, 2020

5. 2024 GMC Denali Ultimate Duramax 10 speed with shudder

   By JCraven, July 9, 2023
   • 10 replies
   • 14.5k views
   • 
   • DBaker
   • April 3, 2025

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

   By LarryM, May 29, 2022
   • 48 replies
   • 14.4k views
   • 
   • MD2014
   • July 6, 2024

7. 2024 2500 weird issues… 1 2

   By Meade2024, March 7, 2024
   • 22 replies
   • 14k views
   • 
   • Meade2024
   • October 18, 2024

8. Does your truck ever go through regen? Mine hasn’t.

   By KC Desert, November 25, 2019
   • 13 replies
   • 13.9k views
   • 
   • baker01
   • January 2, 2021

9. Cameras Not Working on 2020 2500 AT4

   By nuthin_fun, June 14, 2020
   • 3 replies
   • 13.9k views
   • 
   • Chip Fraser
   • January 14, 2021

10. Radio Silence - No Sound?

    By H1ghlndr, September 13, 2024
    • 14 replies
    • 13.9k views
    • 
    • H1ghlndr
    • October 7, 2024

11. Rear end clunk on AT4 HD 1 2 3

    By souper, October 22, 2021
    • 39 replies
    • 13.8k views
    • 
    • Mass2500HD
    • February 28, 2023

12. Android Auto not working correctly

    By In2racn, January 3, 2020
    • 5 replies
    • 13.4k views
    • 
    • Thebelow25
    • January 21, 2020

13. No onstar, gps,or nav

    By airplanefixer, February 4, 2022
    • 7 replies
    • 13.4k views
    • 
    • targ
    • August 28, 2024

14. Leaking rear window, new TSB?

    By kylant, September 13, 2021
    • 4 replies
    • 13k views
    • 
    • Stubborn German
    • February 8, 2022

15. Alternator power to trailer 1 2

    By Rick Schleicher, November 12, 2022
    • 17 replies
    • 13k views
    • 
    • Jettech1
    • February 6, 2023

16. Bluetooth crackling/static after Y172 update 1 2 3

    By BuckWallace, September 22, 2024
    • 40 replies
    • 12.7k views
    • 
    • vucelick
    • June 21, 2025

17. Receiving text messages 1 2

    By The Bopper, September 5, 2019
    • 23 replies
    • 12.7k views
    • 
    • jpgcrna
    • November 24, 2019

18. Brand New truck did not pass CA smog

    By kylant, September 1, 2020
    • 13 replies
    • 12.6k views
    • 
    • ppvsteve
    • April 7, 2023

19. Trailer Tire TPMS System issues 1 2

    By Mbower2020, May 19, 2020
    • 15 replies
    • 12.6k views
    • 
    • Jean Fleury
    • May 28, 2022

20. Radio freezing up 2023 2500HD LT

    By Mass2500HD, June 6, 2023
    • 5 replies
    • 12.5k views
    • 
    • mjm-1957
    • September 9, 2024

21. Headlight adjustment 2020 GMC 2500hd AT4

    By Lance59, February 2, 2020   

    • headlamps
    • headlighs
    • 10 replies
    • 12.5k views
    • 
    • Dunn
    • January 17, 2021

22. Trailer Disconnected but still getting power?

    By LarryM, June 17, 2020
    • 2 replies
    • 12.5k views
    • 
    • bass mechanic
    • June 23, 2020

23. 2020 Chevy 3500HD 6.6l GAS starting problem

    By Ashleet, June 26, 2021
    • 4 replies
    • 12.4k views
    • 
    • GMCustomerService
    • July 22, 2022

24. 2022 silverado 2500hd 6.6l gas excessive cranking to start

    By Dan Lawson, February 24, 2022
    • 13 replies
    • 12.4k views
    • 
    • Ben Jardine
    • December 17, 2024

25. Service Traction Control and Check Engine Light

    By rjgvt, February 27, 2024
    • 3 replies
    • 12.3k views
    • 
    • Weston AKA The Goat
    • February 14, 2025