Troubleshooting, Warranty & Recalls

911 topics in this forum

1. Intermittent won't come out of park

   By Jim Rider, February 18, 2020   

   • shifters
   • steering column
   • 2 replies
   • 1.2k views
   • 
   • Bones454
   • May 6, 2020

2. How can I have my heater steering wheel turn on with remote start

   By rorry altmann, January 28, 2022
   • 2 replies
   • 4.6k views
   • 
   • billa9b0ng
   • January 28, 2022

3. 2023 Sierra 2500 HD Electrical Issues

   By Magnolia Mama, April 22, 2025
   • 2 replies
   • 880 views
   • 
   • NWStever
   • April 27, 2025

4. Steering Issues

   By Tville, December 28, 2019   

   • 6.6L Duramax
   • DenaliHD
   • (and 1 more)

     Tagged with:

     • 6.6L Duramax
     • DenaliHD
     • 2020hd
   • 2 replies
   • 2.1k views
   • 
   • unit
   • April 11, 2020

5. Lower Convex Mirror Adjustment

   By jasschul, December 7, 2021
   • 2 replies
   • 24.7k views
   • 
   • newdude
   • December 7, 2021

6. Reduced power warning, engine light on

   By Rxgolfer, August 14, 2021
   • 2 replies
   • 6.6k views
   • 
   • Tomato
   • August 21, 2021

7. 2020 3500HD Long bed Gooseball

   By Gr8DaneOperator, August 10, 2020
   • 2 replies
   • 1.2k views
   • 
   • Kyle Royston
   • August 28, 2020

8. Infotainment screen goes blank after selecting the TRAILERING APP

   By Ranger473, September 15, 2023
   • 2 replies
   • 1.5k views
   • 
   • UWSkier
   • September 16, 2023

9. 2020 Sierra 2500 Denali steering

   By bowtie2007, December 28, 2019
   • 2 replies
   • 1.1k views
   • 
   • bowtie2007
   • December 29, 2019

10. 10L1000 Assembly Lube?

    By Armgrim, September 19, 2021
    • 2 replies
    • 945 views
    • 
    • Armgrim
    • September 20, 2021

11. Automatic high beams

    By MistaHicks89, November 22, 2020
    • 2 replies
    • 1.1k views
    • 
    • ssowie
    • November 22, 2020

12. Suspension Clunk

    By Faffy, July 29, 2025
    • 2 replies
    • 441 views
    • 
    • Another JR
    • July 30, 2025

13. Trailering app and tire pressure not working after battery dies

    By BnDRoadTrip, January 12, 2024
    • 2 replies
    • 731 views
    • 
    • Another JR
    • January 15, 2024

14. WiFi stuck on

    By Joel S, April 14, 2020
    • 2 replies
    • 1.1k views
    • 
    • MTU Alum
    • April 14, 2020

15. Tailgate release button won’t work with doors locked

    By kf9yr, April 26, 2022
    • 2 replies
    • 1.1k views
    • 
    • NWStever
    • April 27, 2022

16. 2024 radio staying on

    By Crazy Canuck, July 7, 2023
    • 2 replies
    • 3k views
    • 
    • Crazy Canuck
    • July 8, 2023

17. Homelink won’t program to Liftmaster Security 2.0 remote 2021 Denali HD

    By Ron Scott, August 27, 2021
    • 2 replies
    • 3.6k views
    • 
    • Grjfer
    • August 28, 2021

18. 2020 Silverado HD 2500 W/T 4x4

    By Kirkdhill, November 7, 2020   

    • tow/haul
    • 2 replies
    • 967 views
    • 
    • Kirkdhill
    • November 7, 2020

19. 2020 GMC Sierra 1500 won't start

    By HubcapCharlie, November 15, 2020
    • 2 replies
    • 5.2k views
    • 
    • HubcapCharlie
    • January 16, 2021

20. 2020 denali 3500 camera

    By Bruce Riley, July 27, 2020
    • 2 replies
    • 909 views
    • 
    • Gecko50
    • July 31, 2020

21. 2020 2500HD not starting

    By Reiss' Pieces NY, May 28, 2020
    • 2 replies
    • 1.2k views
    • 
    • Stand By
    • May 29, 2020

22. 2020 Sierra 3500HD DIC

    By MDB517, June 11, 2020
    • 2 replies
    • 1.1k views
    • 
    • MDB517
    • June 21, 2020

23. 2024 LTZ Turn signal intermittently triggering wipers

    By davidm767, July 8, 2025
    • 2 replies
    • 763 views
    • 
    • BuckWallace
    • July 8, 2025

24. 2020 GMC Sierra Denali L5p Cooling Fan Issues

    By JR Branche, September 24, 2022
    • 2 replies
    • 7.6k views
    • 
    • gemarsh
    • September 25, 2022

25. Changed Batteries and have reduced power and more.

    By Mattic33, January 10, 2023
    • 2 replies
    • 1.1k views
    • 
    • GMCustomerService
    • January 20, 2023