Troubleshooting, Warranty & Recalls

912 topics in this forum

1. Wheel lugnut torque

   By GMC4Zee, September 2, 2021
   • 4 replies
   • 46.6k views
   • 
   • Lp907
   • December 24, 2021

2. Rampant rust brand new truck.

   By disappointed Duramax, April 16, 2025
   • 4 replies
   • 1.2k views
   • 
   • Z45
   • May 6, 2025

3. 2024 2500 Denali Ultimate Mirror Blind Spot Hit or Miss

   By Dan647, February 14, 2024
   • 4 replies
   • 4k views
   • 
   • Isaiah Tatum
   • January 3, 2025

4. Can't find door dog protector to fit - anyone found one?

   By Koala, August 27, 2022
   • 4 replies
   • 1.3k views
   • 
   • PhilB
   • August 28, 2022

5. 2025 3500 LTZ air conditioning slow to start cooling

   By vucelick, September 2, 2025
   • 4 replies
   • 909 views
   • 
   • UltimateToolReviews
   • November 6, 2025

6. Apple Car Play/Android via Bluetooth instead of plug in??

   By Hog Hunter, July 23, 2020
   • 4 replies
   • 1.7k views
   • 
   • mx_master
   • August 7, 2020

7. axle tube leak at diff

   By kylant, May 2, 2021
   • 4 replies
   • 2.9k views
   • 
   • kylant
   • May 11, 2021

8. Uncommanded attempt to shift to 4-LO at highway speed. WTF?

   By NWStever, September 3, 2025
   • 4 replies
   • 566 views
   • 
   • NWStever
   • September 9, 2025

9. Running Lights go out when auto lights come on…

   By CoryP, June 28, 2024   

   • Running lights
   • electrical issue
   • (and 1 more)

     Tagged with:

     • Running lights
     • electrical issue
     • trailering system
   • 4 replies
   • 2.3k views
   • 
   • hankins1
   • November 17, 2024

10. Brake Squeak 21’ Sierra 2500

    By Jack Aldridge, October 25, 2021
    • 4 replies
    • 2.2k views
    • 
    • gdlou
    • November 30, 2021

11. GM Customer Service

    By bruceb58, August 13, 2024
    • 4 replies
    • 745 views
    • 
    • Another JR
    • August 14, 2024

12. Rear view camera display dimming for no reason.

    By Derek Howard, October 18, 2020
    • 4 replies
    • 1.4k views
    • 
    • Derek Howard
    • December 9, 2020

13. 2025 tailgate with the power up/down feature, what years fit?

    By Suregrip391, November 24, 2024
    • 4 replies
    • 2.3k views
    • 
    • gemarsh
    • December 16, 2024

14. Trailer light pre departure check

    By dquest, September 4, 2021
    • 4 replies
    • 1.4k views
    • 
    • dquest
    • September 11, 2021

15. No rear parking lights (Wiring diagram request)

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

16. Blind hole bearing remover - Transmission Filter Seal Removal???

    By darleyhavidson, March 3
    • 4 replies
    • 542 views
    • 
    • AndrewF
    • March 3

17. Trailer Camera Issues

    By bruceb58, November 9, 2025
    • 3 replies
    • 465 views
    • 
    • bruceb58
    • December 11, 2025

18. Code P159F

    By EdinOhio, April 7, 2024
    • 3 replies
    • 7.7k views
    • 
    • Wyatt1314
    • May 15, 2024

19. Error code u18dc post battery failure

    By MikeMikeMike, July 1, 2024
    • 3 replies
    • 8.5k views
    • 
    • MannyPaz
    • February 18

20. 2021 Duramax, what the heck is this sound?

    By Bighig, November 9, 2024
    • 3 replies
    • 1.7k views
    • 
    • gemarsh
    • November 11, 2024

21. 4G LTE, icon vanished on 8 inch infotainment

    By don penney, August 13, 2021
    • 3 replies
    • 3.5k views
    • 
    • don penney
    • August 17, 2021

22. TPMS lost a sensor then it magically came back miles later...

    By KC Desert, October 6, 2019
    • 3 replies
    • 927 views
    • 
    • KC Desert
    • November 21, 2019

23. 2022 GMC 2500 HD 6.6 Gas 6 SPD 4x4 "Thud or felt motion after stopping"

    By Twayne77, October 19, 2024
    • 3 replies
    • 1.3k views
    • 
    • orchardklutzy
    • November 1, 2024

24. Rear view camera while in drive?

    By skorpyd, January 8, 2020
    • 3 replies
    • 1.4k views
    • 
    • skorpyd
    • January 14, 2020

25. Blind side warning

    By Kittybork, March 6, 2020
    • 3 replies
    • 975 views
    • 
    • Kittybork
    • March 6, 2020