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

171 topics in this forum

1. 10L1000 Trans Fluid Filter

   By 2500W/T, August 31, 2021
   • 2 replies
   • 3.7k views
   • 
   • 2500W/T
   • September 2, 2021

3. 2020 2500 vs 3500 hd diesel 1 2

   By Akwagon, June 25, 2020
   • 28 replies
   • 11.7k views
   • 
   • 2500W/T
   • September 2, 2021

4. looking for engine oil add trick

   By iflypigs, July 16, 2021
   • 8 replies
   • 8.4k views
   • 
   • dgstarr63
   • August 31, 2021

5. fifth wheel hitch

   By Mardo, March 13, 2021
   • 12 replies
   • 5.8k views
   • 
   • 2500W/T
   • August 30, 2021

6. Transfer case leak 3274 miles

   By Bones454, August 23, 2021
   • 4 replies
   • 2.3k views
   • 
   • Bones454
   • August 30, 2021

7. Terrible highway pulling power

   By Trent Gonzalez, June 9, 2021
   • 7 replies
   • 5k views
   • 
   • Jrscrib
   • August 22, 2021

8. Newbie looking for info.

   By Sumrtime, August 13, 2021
   • 1 reply
   • 1.4k views
   • 
   • XY74
   • August 14, 2021

9. 2021 2500 AT4 payload

   By Mardo, March 11, 2021
   • 8 replies
   • 5.3k views
   • 
   • redwngr
   • August 11, 2021

10. ibanks 1.8

    By Laidback, July 29, 2021
    • 3 replies
    • 1.8k views
    • 
    • Random
    • August 10, 2021

11. OEM Steel Rim Size

    By 2500W/T, July 24, 2021
    • 3 replies
    • 794 views
    • 
    • 2500W/T
    • August 2, 2021

12. Oem 5th wheel puck system

    By Eric Griem, July 12, 2021
    • 2 replies
    • 4k views
    • 
    • 2500W/T
    • July 30, 2021

13. 35'S ON 2020 2500

    By scoott, June 16, 2021
    • 2 replies
    • 2.6k views
    • 
    • kylant
    • July 24, 2021

14. Killing a Duramax

    By 2500W/T, July 30, 2020
    • 14 replies
    • 5.7k views
    • 
    • Darth
    • June 21, 2021

15. 3 inch cognito lift

    By ND763, March 24, 2021
    • 2 replies
    • 3.1k views
    • 
    • Dave M.
    • June 5, 2021

16. Transmission

    By Mat gruber, May 18, 2021
    • 2 replies
    • 2.5k views
    • 
    • Laidback
    • May 24, 2021

17. Garage Door Opener - No Power

    By 2506S, May 13, 2021
    • 0 replies
    • 837 views
    • 
    • 2506S
    • May 13, 2021

18. Free DEF from Dealer

    By CMillSilverado, May 10, 2021
    • 2 replies
    • 2.8k views
    • 
    • 20Denali22
    • May 13, 2021

19. Emissions System Error

    By H.B. Shannon, April 20, 2021
    • 4 replies
    • 36.6k views
    • 
    • nick112288
    • May 11, 2021

20. Hot plastic smell

    By BLV, April 23, 2021
    • 3 replies
    • 5.2k views
    • 
    • BLV
    • April 28, 2021

21. Tires rotation and tpms issues

    By Newduramaxh*ar, April 15, 2021
    • 1 reply
    • 1.5k views
    • 
    • redwngr
    • April 15, 2021

22. Problem with intel beam not working

    By BenJG, March 15, 2021
    • 9 replies
    • 2.4k views
    • 
    • RugbyRef
    • March 16, 2021

23. Exhaust brake or lack there of... need others opinion on this?

    By firedab, March 11, 2020
    • 13 replies
    • 17.6k views
    • 
    • Wyoming 3500
    • March 12, 2021

24. 2021 DMAX - cold temp issues?

    By ArrowsmithPML, February 12, 2021
    • 13 replies
    • 4.9k views
    • 
    • redwngr
    • February 26, 2021

25. Oil

    By mostcorey95, February 16, 2021
    • 3 replies
    • 4.4k views
    • 
    • Grumpy Bear
    • February 20, 2021

26. 2021 DMAX - cold temp issues? 1 2

    By ArrowsmithPML, February 10, 2021
    • 16 replies
    • 9.6k views
    • 
    • ArrowsmithPML
    • February 16, 2021