Troubleshooting, Warranty & Recalls

912 topics in this forum

1. 5th Wheel transparent trailer won't calibrate

   By bass mechanic, June 26, 2023
   • 2 replies
   • 2.3k views
   • 
   • bass mechanic
   • July 16, 2023

2. Lane Departure Warning

   By Paul-W4END, April 26, 2021
   • 8 replies
   • 2.3k views
   • 
   • Paul-W4END
   • April 29, 2021

3. 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

4. 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

5. Battery Light

   By JoeyF1722, October 31, 2022
   • 9 replies
   • 2.3k views
   • 
   • JoeyF1722
   • November 2, 2022

6. Do I need to get the undercoat treated?

   By GMC4Zee, September 19, 2021
   • 4 replies
   • 2.3k views
   • 
   • dquest
   • December 27, 2021

7. Noise near or under drivers side of cab

   By Dusilligaf, November 18, 2023
   • 2 replies
   • 2.3k views
   • 
   • Crazy Canuck
   • November 21, 2023

8. 2020 2500HD Fuel Filler Door Spring

   By Mketch.918, January 9, 2021
   • 0 replies
   • 2.3k views
   • 
   • Mketch.918
   • January 9, 2021

9. Maintenance Mode for Brake Pad Replacement?

   By SuperDuper, December 10, 2024
   • 3 replies
   • 2.3k views
   • 
   • SuperDuper
   • December 15, 2024

10. Truck not sitting level

    By Christopher Murphy, January 5, 2020
    • 2 replies
    • 2.3k views
    • 
    • Christopher Murphy
    • January 21, 2020

11. Factory battery life length 1 2

    By Randal Scott, June 5, 2025
    • 15 replies
    • 2.3k views
    • 
    • Chuck FB
    • December 3, 2025

12. TPMS low pressure alert perplexion

    By Maninthesea, January 28, 2023
    • 10 replies
    • 2.3k views
    • 
    • sabre364
    • May 27, 2023

13. 23 Sierra 2500HD 6.6 Gas/6L90 drivetrain whine

    By 15DenaliSummit, December 6, 2024   

    • Drivetrain whine
    • 13 replies
    • 2.2k views
    • 
    • Chuck FB
    • December 15, 2025

14. Engine oil fill tube

    By C1carguy, January 5, 2020
    • 0 replies
    • 2.2k views
    • 
    • C1carguy
    • January 5, 2020

15. 2020 Sierra 2500 Denali HD - DEF Tank/Wiring Failures

    By Cheryl Blair, January 10, 2022
    • 0 replies
    • 2.2k views
    • 
    • Cheryl Blair
    • January 10, 2022

16. DIY Services....How to make part of Vehicle Service History in GM system?

    By SoCal Angler, July 9, 2024
    • 7 replies
    • 2.2k views
    • 
    • 64BAwagon
    • August 3, 2024

17. Drivers Side Wide Angle Lower Mirror ?

    By GhostComanche, July 14, 2021
    • 7 replies
    • 2.2k views
    • 
    • KuiMonster
    • August 7, 2021

18. 2024 HD3500 High Country reverse lights

    By BigA, November 30, 2024
    • 5 replies
    • 2.2k views
    • 
    • tonto340
    • December 1, 2024

19. 2020 2500HD Duramax crackling on idle

    By Newduramaxh*ar, June 29, 2020
    • 3 replies
    • 2.2k views
    • 
    • Tomato
    • June 30, 2020

20. Brake Squeak 21’ Sierra 2500

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

21. Automatic Highbeam / LDW Issues Only at Night

    By crspangenberg, September 25, 2024
    • 5 replies
    • 2.2k views
    • 
    • ShotgunZ71
    • February 5

22. Abs pump noise

    By Rick o, June 25, 2020
    • 0 replies
    • 2.2k views
    • 
    • Rick o
    • June 25, 2020

23. Vibration

    By fonz46, November 21, 2019
    • 1 reply
    • 2.1k views
    • 
    • Cool J
    • November 21, 2019

24. Reduced power and engine shut down!

    By Chuck Ken, July 15, 2023
    • 3 replies
    • 2.1k views
    • 
    • Jettech1
    • July 16, 2023

25. 2023 2500 6.6 GAS fuel overflowing when filling up

    By Kevin Wanczyk, April 17, 2023
    • 7 replies
    • 2.1k views
    • 
    • newdude
    • April 19, 2023