Troubleshooting, Warranty & Recalls

910 topics in this forum

1. 2024 Sierra HD Wire Diagram

   By Nick McDermott, November 1, 2023
   • 8 replies
   • 27.2k views
   • 
   • 23GMCPHX
   • December 15, 2024

2. Maintenance Mode for Brake Pad Replacement?

   By SuperDuper, December 10, 2024
   • 3 replies
   • 2.2k views
   • 
   • SuperDuper
   • December 15, 2024

3. Poor fuel mileage on 2024 Duramax 1 2 3

   By MesaRat, September 5, 2023
   • 30 replies
   • 48.7k views
   • 
   • nparker76
   • December 14, 2024

4. Auto Dimming Mirrors

   By 426ted, November 14, 2023
   • 4 replies
   • 11.9k views
   • 
   • Neanderthal Engineer
   • December 14, 2024

5. Oil Change on a 2023 L5P

   By Bob Mc Kenzie, December 13, 2024
   • 1 reply
   • 1.7k views
   • 
   • newdude
   • December 13, 2024

6. 2024 still having headlight problems even after replacement

   By jd64, August 17, 2023
   • 13 replies
   • 18.3k views
   • 
   • Jimmy Jim Jim
   • December 12, 2024

7. 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
   • 7.6k views
   • 
   • dakota42000
   • December 10, 2024

8. No Trailer Connected Issue 1 2

   By Leon Baehre, March 7, 2020
   • 22 replies
   • 54.3k views
   • 
   • Darrell Moore
   • December 8, 2024

9. 2020 2500hd high country door latch noisy 1 2 3 4

   By Paul jackckson, December 15, 2020
   • 53 replies
   • 27k views
   • 
   • Lew2024denali3500
   • December 6, 2024

10. Changing to neutral with dead battery

    By DMcKinney, March 18, 2024
    • 11 replies
    • 58.5k views
    • 
    • redwngr
    • December 1, 2024

11. 2024 HD3500 High Country reverse lights

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

12. active aero shutters 1 2 3 4 5

    By H1ghlndr, June 23, 2020
    • 67 replies
    • 46.5k views
    • 
    • revrnd
    • November 23, 2024

13. 2024 silverado 2500 turn signal noise

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

14. OBD2 circuit, need to locate fuse.

    By JLeosnow, November 18, 2024
    • 2 replies
    • 10.8k views
    • 
    • JLeosnow
    • November 18, 2024

15. 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

16. key fob transmitter faulty? 1 2 3

    By FirstAscent, March 24, 2020
    • 39 replies
    • 46.4k views
    • 
    • revrnd
    • November 14, 2024

17. Errors with Flatbed Wiring

    By Crosley623, November 12, 2024
    • 0 replies
    • 740 views
    • 
    • Crosley623
    • November 12, 2024

18. 2021 Duramax, what the heck is this sound?

    By Bighig, November 9, 2024
    • 3 replies
    • 1.6k views
    • 
    • gemarsh
    • November 11, 2024

19. Rear Differential Clutch Lock up

    By Andy Casperson, November 10, 2024
    • 4 replies
    • 3.5k views
    • 
    • Andy Casperson
    • November 10, 2024

20. 2024 high country 13" ent system w/ bose - Audio not working

    By pedroericr, April 23, 2024
    • 13 replies
    • 8.8k views
    • 
    • H1ghlndr
    • November 7, 2024

21. Truck is not connecting to Home Wi-fi

    By Dick Olson, November 5, 2024
    • 0 replies
    • 657 views
    • 
    • Dick Olson
    • November 5, 2024

22. 2020 2500 duramax ac drain line location

    By bmpiper55, November 4, 2024
    • 0 replies
    • 490 views
    • 
    • bmpiper55
    • November 4, 2024

23. 2024 2500HD Gasser Doesn't Charge in Park! 1 2

    By jake111, October 29, 2024
    • 26 replies
    • 2.6k views
    • 
    • bruceb58
    • November 3, 2024

24. Passenger battery distribution block diagram

    By Gunnar Jacobson, December 28, 2022
    • 7 replies
    • 45.7k views
    • 
    • Ricklrunge
    • November 3, 2024

25. AC Port Location

    By Wmwbutler, November 1, 2024
    • 2 replies
    • 8.9k views
    • 
    • Wmwbutler
    • November 3, 2024