6.6L Duramax Diesel & Allison Powertrain (L5P/MGM)

171 topics in this forum

1. Gear indicator on cluster for 2024 GMC Sierra 3500HD

   By Truck Novice, 21 hours ago
   • 4 replies
   • 125 views
   • 
   • newdude
   • 4 hours ago

3. Banks Derringer on 2024? 1 2

   By bass mechanic, May 22, 2023
   • 23 replies
   • 7.8k views
   • 
   • A Chap
   • Monday at 07:27 AM

4. 2024 3500 oil leak 1 2 3

   By Rototerrier, November 11, 2023
   • 33 replies
   • 5.2k views
   • 
   • Pryme
   • April 15

5. Does a 2024 Duramax have fewer emissions issues? 1 2 3

   By Rabbittown, January 31
   • 32 replies
   • 3k views
   • 
   • Jettech1
   • April 9

6. Gassing up while running

   By Carlos Clark II MD, January 5
   • 12 replies
   • 1.5k views
   • 
   • sstoner911
   • April 5

7. Need estimated time to R&R Fuel System at dealer

   By doverarjim, March 23
   • 2 replies
   • 343 views
   • 
   • customboss
   • April 3

8. diesel fuel additives

   By tc64, September 16, 2020
   • 10 replies
   • 11.7k views
   • 
   • waltman
   • March 16

9. 2022 Silverado 2500HD Duramax Transmission Temp High with Normal Driving, Not Towing 1 2 3

   By D Fowers, July 20, 2022
   • 37 replies
   • 12.2k views
   • 
   • Frankyg25
   • March 11

10. P1089 Code: 2024 2500 HD 6.6L diesel pkg

    By Big Vic, November 8, 2023
    • 1 reply
    • 1.3k views
    • 
    • Niklasbraun
    • March 5

11. Block heater power cord

    By Randal Scott, September 8, 2023
    • 6 replies
    • 2.1k views
    • 
    • Crazy Canuck
    • February 9

12. 2025 8.3L Duramax

    By C/K Man, January 31
    • 0 replies
    • 2.5k views
    • 
    • C/K Man
    • January 31

13. Oil Filter

    By lamoon78, January 19
    • 4 replies
    • 1.1k views
    • 
    • newdude
    • January 24

14. Leaking Diesel Fuel when topping off the tank

    By Rguerra, December 1, 2020
    • 12 replies
    • 11.2k views
    • 
    • z28tranz
    • January 4

15. '24 H.D. Duramax-Allison Cold Start Motion Surge in Park

    By Kerry Pulaski, December 17, 2023
    • 9 replies
    • 1.4k views
    • 
    • Kerry Pulaski
    • December 21, 2023

16. 10L1000 Service

    By augiemattheiss, September 5, 2023
    • 7 replies
    • 4.3k views
    • 
    • gerald allen
    • December 19, 2023

17. L5P Oil Filter Choices ?? Also GM "Allison" 10L1000 Oil Pan .

    By Kerry Pulaski, November 6, 2023
    • 4 replies
    • 2.1k views
    • 
    • gerald allen
    • December 19, 2023

18. No power on the trailer B+ charging wire 7 pin connector

    By Meldridge73, July 1, 2023
    • 6 replies
    • 2k views
    • 
    • Jack Horn
    • December 15, 2023

19. Lower Shutter removed

    By OldasDirt, April 16, 2023
    • 1 reply
    • 2.7k views
    • 
    • Clmntsjaryd
    • December 2, 2023

20. Oil Leak 2023 3500

    By scrver, October 16, 2023
    • 3 replies
    • 2.2k views
    • 
    • 64BAwagon
    • October 16, 2023

21. 2020 Silverado 2500 HD

    By Trey249, September 27, 2023
    • 0 replies
    • 1.2k views
    • 
    • Trey249
    • September 27, 2023

22. Duramax fuel filter question

    By Dennis Prior, September 26, 2023
    • 1 reply
    • 1.7k views
    • 
    • gemarsh
    • September 26, 2023

23. Need Deleted L5P Advice 1 2 3

    By Brozat4, January 30, 2021
    • 31 replies
    • 51.7k views
    • 
    • cemem
    • September 16, 2023

24. High Idle 1 2

    By gSwift, July 13, 2020
    • 16 replies
    • 60.5k views
    • 
    • redwngr
    • August 20, 2023

25. Is this Oil OK To Use in the Duramax 6.6

    By ILSilverado, August 14, 2023
    • 3 replies
    • 2.3k views
    • 
    • newdude
    • August 15, 2023

26. Extended Idle on Duramax L5P

    By GulfMP, August 12, 2023
    • 0 replies
    • 1.6k views
    • 
    • GulfMP
    • August 12, 2023