2020-2024 Silverado HD & Sierra HD Troubleshooting

790 topics in this forum

1. 2020 GMC Sierra Denali L5p Cooling Fan Issues

   By JR Branche, September 24, 2022
   • 2 replies
   • 4.8k views
   • 
   • gemarsh
   • September 25, 2022

3. Bed plug part number

   By BigDs_DenaliHD, September 19, 2022
   • 4 replies
   • 5.9k views
   • 
   • BigDs_DenaliHD
   • September 25, 2022

4. low voltage at trailer plug

   By Henry L, September 23, 2022   

   • brakes
   • 0 replies
   • 2k views
   • 
   • Henry L
   • September 23, 2022

5. 2020 GMC Sierra 2500HD Error Code P20EE 1 2

   By slimjim7772, September 24, 2019
   • 28 replies
   • 30.9k views
   • 
   • davester
   • September 22, 2022

6. A new 2500 I ordered questions.

   By waltman, September 19, 2022
   • 11 replies
   • 1.1k views
   • 
   • garagerog
   • September 21, 2022

7. Radio calibration

   By alonhighcontry, September 15, 2022
   • 1 reply
   • 1.8k views
   • 
   • Texas1836
   • September 17, 2022

8. "Pro Trailering" missing from MY-GMC app

   By In2racn, August 29, 2022
   • 3 replies
   • 1.1k views
   • 
   • Crazy Canuck
   • September 13, 2022

9. Throwing a code for active grill shutter

   By Daniel hurst, August 23, 2022   

   • active shutters
   • regen
   • (and 1 more)

     Tagged with:

     • active shutters
     • regen
     • recalls
   • 5 replies
   • 9.7k views
   • 
   • GMCustomerService
   • September 9, 2022

10. Paint looking unfinished

    By Carolina, September 7, 2022
    • 3 replies
    • 1.2k views
    • 
    • CamGTP
    • September 8, 2022

11. Service DEF System... XX Miles Untill 65MPH max speed!! HELP PLZ?

    By JohnnyLewis1, August 30, 2022
    • 2 replies
    • 1.2k views
    • 
    • GMCustomerService
    • September 2, 2022

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

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

13. Silverado CarPlay question

    By Denby, August 12, 2022
    • 1 reply
    • 638 views
    • 
    • Njmurvin
    • August 24, 2022

14. A/C Issues

    By jesystems, March 23, 2022
    • 4 replies
    • 21.3k views
    • 
    • Mat Noel
    • August 12, 2022

15. Bed swap

    By Glo, June 11, 2022
    • 1 reply
    • 688 views
    • 
    • Mat Noel
    • August 12, 2022

16. 2021 GMC 3500 AT4 Power Running Boards

    By Fire1382fighter, June 29, 2021
    • 8 replies
    • 6.9k views
    • 
    • Aircop
    • August 12, 2022

17. 2020 HD 3500 water leaking from the back window during a rain storm.

    By Farmergus, August 9, 2022   

    • water leak
    • 2019 same problem
    • 1 reply
    • 1.1k views
    • 
    • bowtie2007
    • August 10, 2022

18. Service ESC light coming on in hot weather

    By Nhcampbells, July 16, 2021
    • 9 replies
    • 1.6k views
    • 
    • GMCustomerService
    • August 5, 2022

19. Brake Squeal Still there

    By DonYukon, August 1, 2022
    • 2 replies
    • 930 views
    • 
    • gemarsh
    • August 5, 2022

20. Infotainment/weather ?

    By Cheekster96, August 2, 2022
    • 2 replies
    • 1.1k views
    • 
    • Cheekster96
    • August 2, 2022

21. Infotainment Audio Issues 1 2

    By kf9yr, May 8, 2020
    • 29 replies
    • 23.6k views
    • 
    • kf9yr
    • July 31, 2022

22. 2021 GMC Sierra 2500 Trailer Light Issues - "Check Trailer Rear Lamp" Message

    By rickmc17, July 29, 2021
    • 5 replies
    • 18.1k views
    • 
    • billdlc
    • July 30, 2022

23. 2020 Chevy 3500HD 6.6l GAS starting problem

    By Ashleet, June 26, 2021
    • 4 replies
    • 8.2k views
    • 
    • GMCustomerService
    • July 22, 2022

24. Cabover camper wiring with both camper prep (VYU) and 5th wheel prep (CMT) packages

    By shanek, July 21, 2022
    • 6 replies
    • 971 views
    • 
    • shanek
    • July 22, 2022

25. Power Windows

    By marpel, July 15, 2022
    • 5 replies
    • 1.5k views
    • 
    • Another JR
    • July 16, 2022

26. Trailer app

    By Stacey66, July 15, 2022
    • 0 replies
    • 533 views
    • 
    • Stacey66
    • July 15, 2022