Troubleshooting, Warranty & Recalls

918 topics in this forum

1. 2024 2500 Denali Ultimate Mirror Blind Spot Hit or Miss

   By Dan647, February 14, 2024
   • 4 replies
   • 4.1k views
   • 
   • Isaiah Tatum
   • January 3, 2025

2. 2021 Sierra Trailer Brake Problems

   By Whip, April 19, 2024
   • 2 replies
   • 2.7k views
   • 
   • bruceb58
   • December 30, 2024

3. TPMS reading rear tire pressures incorrectly 1 2

   By msmanuel, December 16, 2024   

   • 2022 silverado 2500 HD
   • High Country 6.6 Duramax
   • 16 replies
   • 5.5k views
   • 
   • msmanuel
   • December 28, 2024

4. Bluetooth disconnect and phone call crackling on 2025 GMC Sierra

   By Bob Sales, December 25, 2024
   • 2 replies
   • 1.8k views
   • 
   • BuckWallace
   • December 26, 2024

5. tow mirror issue 1 2

   By kylant, September 27, 2023
   • 23 replies
   • 16.8k views
   • 
   • 105s
   • December 24, 2024

6. language

   By lobo381, December 20, 2024
   • 0 replies
   • 635 views
   • 
   • lobo381
   • December 20, 2024

7. Touch Screen Unresponsive

   By revrnd, December 18, 2024
   • 2 replies
   • 17k views
   • 
   • revrnd
   • December 18, 2024

8. 2022 silverado 2500hd 6.6l gas excessive cranking to start

   By Dan Lawson, February 24, 2022
   • 13 replies
   • 12.7k views
   • 
   • Ben Jardine
   • December 17, 2024

9. 2025 tailgate with the power up/down feature, what years fit?

   By Suregrip391, November 24, 2024
   • 4 replies
   • 2.4k views
   • 
   • gemarsh
   • December 16, 2024

10. 2024 Sierra HD Wire Diagram

    By Nick McDermott, November 1, 2023
    • 8 replies
    • 27.9k views
    • 
    • 23GMCPHX
    • December 15, 2024

11. Maintenance Mode for Brake Pad Replacement?

    By SuperDuper, December 10, 2024
    • 3 replies
    • 2.4k views
    • 
    • SuperDuper
    • December 15, 2024

12. Poor fuel mileage on 2024 Duramax 1 2 3

    By MesaRat, September 5, 2023
    • 30 replies
    • 49.8k views
    • 
    • nparker76
    • December 14, 2024

13. Auto Dimming Mirrors

    By 426ted, November 14, 2023
    • 4 replies
    • 12.2k views
    • 
    • Neanderthal Engineer
    • December 14, 2024

14. Oil Change on a 2023 L5P

    By Bob Mc Kenzie, December 13, 2024
    • 1 reply
    • 1.8k views
    • 
    • newdude
    • December 13, 2024

15. 2024 still having headlight problems even after replacement

    By jd64, August 17, 2023
    • 13 replies
    • 18.7k views
    • 
    • Jimmy Jim Jim
    • December 12, 2024

16. 2020 2020 3500 denali snowmobile deck lights turn off with brake or signal

    By Ryan Evans, October 29, 2019   

    • l5p duramax
    • trailer
    • (and 3 more)

      Tagged with:

      • l5p duramax
      • trailer
      • sled deck
      • marlon
      • New so wtf
    • 7 replies
    • 7.7k views
    • 
    • dakota42000
    • December 10, 2024

17. No Trailer Connected Issue 1 2

    By Leon Baehre, March 7, 2020
    • 22 replies
    • 55k views
    • 
    • Darrell Moore
    • December 8, 2024

18. 2020 2500hd high country door latch noisy 1 2 3 4

    By Paul jackckson, December 15, 2020
    • 53 replies
    • 27.2k views
    • 
    • Lew2024denali3500
    • December 6, 2024

19. Changing to neutral with dead battery

    By DMcKinney, March 18, 2024
    • 11 replies
    • 61.9k views
    • 
    • redwngr
    • December 1, 2024

20. 2024 HD3500 High Country reverse lights

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

21. active aero shutters 1 2 3 4 5

    By H1ghlndr, June 23, 2020
    • 67 replies
    • 47.3k views
    • 
    • revrnd
    • November 23, 2024

22. 2024 silverado 2500 turn signal noise

    By Tims72fte, November 19, 2024
    • 0 replies
    • 682 views
    • 
    • Tims72fte
    • November 19, 2024

23. OBD2 circuit, need to locate fuse.

    By JLeosnow, November 18, 2024
    • 2 replies
    • 11.8k views
    • 
    • JLeosnow
    • November 18, 2024

24. 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
    • 2.4k views
    • 
    • hankins1
    • November 17, 2024

25. key fob transmitter faulty? 1 2 3

    By FirstAscent, March 24, 2020
    • 39 replies
    • 47k views
    • 
    • revrnd
    • November 14, 2024