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

183 topics in this forum

1. Power tailgate will not close

   By pegasus, June 8, 2020
   • 1 reply
   • 1.4k views
   • 
   • MTU Alum
   • June 8, 2020

3. fuel tank Fuel tank

   By JohnL1962, June 7, 2020
   • 4 replies
   • 2k views
   • 
   • JohnL1962
   • June 8, 2020

4. 2020 L5P First Oil Change 1 2 3

   By MrGraff, October 16, 2019
   • 34 replies
   • 64.6k views
   • 
   • redwngr
   • May 22, 2020

5. A DEF Product Question 1 2

   By 2500W/T, May 7, 2020
   • 19 replies
   • 8.1k views
   • 
   • FirstAscent
   • May 17, 2020

6. Fender Flare with reflector/light for Silverado 2500?

   By STRUCTUAL_PE, April 11, 2020
   • 7 replies
   • 3.7k views
   • 
   • ChuckTaylor
   • May 9, 2020

7. Towing question? 1 2

   By mbsfgts, September 15, 2019
   • 15 replies
   • 7.7k views
   • 
   • 2500W/T
   • May 8, 2020

8. Front license plate

   By Butch59, April 25, 2020
   • 4 replies
   • 2k views
   • 
   • redwngr
   • April 27, 2020

9. Input - HD front springs and Z71 Pkg. 1 2

   By MesaRat, March 12, 2020
   • 24 replies
   • 4.3k views
   • 
   • MesaRat
   • April 25, 2020

10. 2020 GMC 3500 Denali (6.6) DRW

    By Bigcountry70, April 13, 2020
    • 4 replies
    • 1.6k views
    • 
    • redwngr
    • April 23, 2020

11. DEF usage. 6.6 vs 3.0 1 2

    By topgear1224, April 17, 2020
    • 18 replies
    • 18.7k views
    • 
    • topgear1224
    • April 19, 2020

12. Parts Issue for a 2019 GMC HD Denali

    By Mike Hiser, April 15, 2020
    • 2 replies
    • 1.4k views
    • 
    • davester
    • April 15, 2020

13. Question about new 2500HD Diesel tow capacity

    By fsunole33, April 9, 2020
    • 13 replies
    • 5k views
    • 
    • XY74
    • April 15, 2020

14. Dual Alternators and Aux Battery Questions

    By jeffd, April 1, 2020
    • 5 replies
    • 11.9k views
    • 
    • redwngr
    • April 2, 2020

15. Engine Temperature

    By rusrtytr4, February 15, 2020
    • 8 replies
    • 19.9k views
    • 
    • powerhaulic
    • March 28, 2020

16. S&B Map Sensor Spacer? Oil Filters?

    By MrGraff, March 19, 2020
    • 0 replies
    • 1.4k views
    • 
    • MrGraff
    • March 19, 2020

17. Fass fuel filter system

    By Lfod1836, March 9, 2020
    • 2 replies
    • 1.5k views
    • 
    • Lfod1836
    • March 10, 2020

18. New GM L5P Duramax parts plant

    By SilveradoX2, March 5, 2020
    • 0 replies
    • 951 views
    • 
    • SilveradoX2
    • March 5, 2020

19. Oil Change Interval

    By withee1319, March 1, 2020
    • 13 replies
    • 40.6k views
    • 
    • Grumpy Bear
    • March 3, 2020

20. Plug in

    By Anderc1, February 19, 2020
    • 5 replies
    • 17.5k views
    • 
    • Sask Farmboy
    • March 1, 2020

21. 2020 2500HD Denali Power Loss

    By tima0101, February 17, 2020
    • 6 replies
    • 8.5k views
    • 
    • Sask Farmboy
    • March 1, 2020

22. Exhaust coming into the cab

    By 426yzf, November 7, 2019
    • 2 replies
    • 1.2k views
    • 
    • Skilpot
    • February 25, 2020

23. Vibration in Steering Column

    By dkhelms, February 18, 2020
    • 2 replies
    • 1.2k views
    • 
    • Tomato
    • February 21, 2020

24. Misc Recalls - First Oil Change

    By dab5577, February 19, 2020
    • 2 replies
    • 2.3k views
    • 
    • dab5577
    • February 20, 2020

25. Please help with a towing question 1 2

    By Pfc1, August 25, 2019
    • 21 replies
    • 4.3k views
    • 
    • CNY_AT4
    • February 14, 2020

26. 2019 Chev 3500HD L5P Shutting Off

    By Pedro DeLeon Jr, August 26, 2019
    • 7 replies
    • 4.6k views
    • 
    • redwngr
    • January 30, 2020