6.6L Duramax Diesel (L5P)

205 topics in this forum

1. Aftermarket exhaust/intake Options 1 2 3

   By Skididdy, September 22, 2020
   • 31 replies
   • 27.2k views
   • 
   • motorsswin
   • November 17, 2020

2. 2021 Diesel break in 1 2 3

   By Bayou Cajun, November 3, 2020
   • 36 replies
   • 23.9k views
   • 
   • Grumpy Bear
   • November 17, 2020

3. DEF Spraying undercarrage

   By Lfod1836, November 1, 2020
   • 1 reply
   • 1.7k views
   • 
   • Keith_Schumaker
   • November 1, 2020

4. Conventional or full synthetic 1 2 3 4 5

   By 07HD, March 24, 2020
   • 72 replies
   • 63.4k views
   • 
   • Charles Ha11
   • October 28, 2020

5. Flapping/rattle/tick? while coming to stop (deceleration).

   By combat1500, October 20, 2020
   • 5 replies
   • 12.9k views
   • 
   • Pate Services
   • October 21, 2020

6. My first diesel

   By Danny R. Sucher, October 13, 2020   

   • Oil pressure? Warm up?
   • 5 replies
   • 10.7k views
   • 
   • Danny R. Sucher
   • October 15, 2020

7. Duromax thumping sound

   By William Chapman, March 18, 2020
   • 10 replies
   • 31.3k views
   • 
   • Tomato
   • October 14, 2020

8. PTO Question

   By HaulinHarv, October 4, 2020
   • 0 replies
   • 2.8k views
   • 
   • HaulinHarv
   • October 4, 2020

9. 2500 mods

   By 1JRB, August 15, 2020
   • 3 replies
   • 2.9k views
   • 
   • Rguerra
   • September 29, 2020

10. Extended warranty

    By shadow gray 2020 hd, September 9, 2020
    • 10 replies
    • 13k views
    • 
    • redwngr
    • September 26, 2020

11. 20 Duramax MPG.......how are we doing? 1 2 3

    By Peekaboo Bruizer, November 22, 2019
    • 41 replies
    • 27.2k views
    • 
    • Lfod1836
    • September 24, 2020

12. Changing my grill

    By 2020 DirtyMax, June 5, 2020
    • 1 reply
    • 1.9k views
    • 
    • buelldude
    • September 12, 2020

13. New Truck/First Towing Experience

    By CAMPINGCPL, September 8, 2020
    • 6 replies
    • 2.9k views
    • 
    • CAMPINGCPL
    • September 10, 2020

14. 2020 2500AT4 with Duramax Max Payload

    By Troy Gallagher, August 27, 2020
    • 13 replies
    • 3.4k views
    • 
    • Njmurvin
    • September 1, 2020

15. OEM Fuel filtration

    By Njmurvin, August 6, 2020
    • 3 replies
    • 4.1k views
    • 
    • redwngr
    • August 9, 2020

16. 3500 srw differential fluid capacity

    By rblanch, July 26, 2020
    • 13 replies
    • 42.1k views
    • 
    • redwngr
    • July 27, 2020

17. Thinking out loud 1 2

    By Vincent Vignola, July 21, 2020
    • 17 replies
    • 3.1k views
    • 
    • gearheadesw
    • July 23, 2020

18. Regen Mode - Engine "Misfiring?"

    By Tomato, June 22, 2020
    • 4 replies
    • 6.3k views
    • 
    • MrGraff
    • July 21, 2020

19. 2020 GMC 2500 Standard Bed - Roll Up Cover

    By JShover, July 12, 2020
    • 3 replies
    • 1.8k views
    • 
    • MrGraff
    • July 21, 2020

20. Payload question- long vs short bed

    By doc7string, July 9, 2020
    • 7 replies
    • 3.3k views
    • 
    • samuse
    • July 19, 2020

21. Diesel Fuel Additive

    By KKDuramax, June 17, 2020
    • 4 replies
    • 21.6k views
    • 
    • Colossus
    • July 12, 2020

22. 2020 2500HD Diesel brake vibrating

    By Prestigeww, June 9, 2020
    • 9 replies
    • 8.6k views
    • 
    • Prestigeww
    • June 12, 2020

23. Power tailgate will not close

    By pegasus, June 8, 2020
    • 1 reply
    • 1.6k views
    • 
    • MTU Alum
    • June 8, 2020

24. fuel tank Fuel tank

    By JohnL1962, June 7, 2020
    • 4 replies
    • 2.3k views
    • 
    • JohnL1962
    • June 8, 2020

25. 2020 L5P First Oil Change 1 2 3

    By MrGraff, October 16, 2019
    • 34 replies
    • 71.5k views
    • 
    • redwngr
    • May 22, 2020