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

183 topics in this forum

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

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

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

   By Big Vic, November 8, 2023
   • 1 reply
   • 3.7k views
   • 
   • Niklasbraun
   • March 5

4. Block heater power cord

   By Randal Scott, September 8, 2023
   • 6 replies
   • 3.2k views
   • 
   • Crazy Canuck
   • February 9

5. Leaking Diesel Fuel when topping off the tank

   By Rguerra, December 1, 2020
   • 12 replies
   • 13.6k views
   • 
   • z28tranz
   • January 4

6. '24 H.D. Duramax-Allison Cold Start Motion Surge in Park

   By Kerry Pulaski, December 17, 2023
   • 9 replies
   • 2.5k views
   • 
   • Kerry Pulaski
   • December 21, 2023

7. 10L1000 Service

   By augiemattheiss, September 5, 2023
   • 7 replies
   • 8k views
   • 
   • gerald allen
   • December 19, 2023

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

   By Kerry Pulaski, November 6, 2023
   • 4 replies
   • 4.1k views
   • 
   • gerald allen
   • December 19, 2023

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

   By Meldridge73, July 1, 2023
   • 6 replies
   • 2.3k views
   • 
   • Jack Horn
   • December 15, 2023

10. Lower Shutter removed

    By OldasDirt, April 16, 2023
    • 1 reply
    • 3.6k views
    • 
    • Clmntsjaryd
    • December 2, 2023

11. Oil Leak 2023 3500

    By scrver, October 16, 2023
    • 3 replies
    • 3.7k views
    • 
    • 64BAwagon
    • October 16, 2023

12. 2020 Silverado 2500 HD

    By Trey249, September 27, 2023
    • 0 replies
    • 1.4k views
    • 
    • Trey249
    • September 27, 2023

13. Duramax fuel filter question

    By Dennis Prior, September 26, 2023
    • 1 reply
    • 2.6k views
    • 
    • gemarsh
    • September 26, 2023

14. High Idle 1 2

    By gSwift, July 13, 2020
    • 16 replies
    • 66.3k views
    • 
    • redwngr
    • August 20, 2023

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

    By ILSilverado, August 14, 2023
    • 3 replies
    • 3.5k views
    • 
    • newdude
    • August 15, 2023

16. Extended Idle on Duramax L5P

    By GulfMP, August 12, 2023
    • 0 replies
    • 1.9k views
    • 
    • GulfMP
    • August 12, 2023

17. 2020 Regen frequency has increased sginificantly

    By Gitusom, August 4, 2023
    • 2 replies
    • 3.3k views
    • 
    • Gitusom
    • August 8, 2023

18. 2020 Silverado 2500 DEF usage 1 2 3 4 5

    By gjohnston7, June 3, 2020
    • 74 replies
    • 57.9k views
    • 
    • Madams1970
    • July 20, 2023

19. 2024 Allison transmission vibrating

    By James Z, June 15, 2023
    • 2 replies
    • 2.5k views
    • 
    • James Z
    • June 16, 2023

20. 220 Amp Alternator Question - 2021 Silverado 2500HD Duramax 1 2

    By tortiseshell, April 1, 2022
    • 16 replies
    • 12.8k views
    • 
    • Terry OBrien
    • May 20, 2023

21. I try not to look at this section... 1 2

    By Jettech1, January 1, 2023
    • 17 replies
    • 5.7k views
    • 
    • kevin74
    • May 11, 2023

22. Duramax Newbie

    By waltman, May 11, 2023
    • 0 replies
    • 2.1k views
    • 
    • waltman
    • May 11, 2023

23. Ticking sound at idle

    By Bones454, July 4, 2020
    • 8 replies
    • 13.9k views
    • 
    • Hunter_s
    • May 9, 2023

24. Something locked up causing me to skit to a halt.

    By Steve Macedo, April 15, 2023
    • 7 replies
    • 4.1k views
    • 
    • 4x4Hank
    • April 30, 2023

25. Fuel filter change with push-button start

    By Penndel Zeke, December 19, 2020
    • 7 replies
    • 43.8k views
    • 
    • redwngr
    • April 15, 2023

26. Anyone buy the GMC "Prepaid Mainenance" plan?

    By blamkin86, February 21, 2023
    • 3 replies
    • 2.4k views
    • 
    • gemarsh
    • February 23, 2023