6.6L (LML/L5P) & 6.0L (L96/LC8) Tech

224 topics in this forum

1. 6.0 gas engine 1 2 3 4 11

   By cat320, November 3, 2014
   • 157 replies
   • 49.9k views
   • 
   • SierraHD17
   • April 15, 2018

3. Trans fluid change in 2015 2500hd 6.0

   By ryanhardy, March 19, 2018
   • 7 replies
   • 26.5k views
   • 
   • Cowpie
   • April 8, 2018

4. DEF low in less than 2 weeks 1 2

   By austingta, July 21, 2016
   • 20 replies
   • 5.6k views
   • 
   • Colossus
   • April 8, 2018

5. DEF tank

   By Peterd, July 2, 2017
   • 9 replies
   • 10.6k views
   • 
   • 1st diesel truck
   • March 23, 2018

6. 2018 GMC 2500 Denali Hitch issue

   By 352Teetime, March 9, 2018
   • 1 reply
   • 8.6k views
   • 
   • grandpalarry777
   • March 10, 2018

7. 2500HD 6.0 oil 1 2 3

   By T_ClarkEx39, September 15, 2017
   • 34 replies
   • 29.8k views
   • 
   • Cowpie
   • March 3, 2018

8. considerind upgrade from 2005Sierra Denali to 2015 2500 Sierra Denali Duramax

   By atlantaman, February 5, 2018   

   • questions on cars
   • 0 replies
   • 1.4k views
   • 
   • atlantaman
   • February 5, 2018

9. Should I Buy a New Duramax 1 2

   By Daboom48, October 30, 2017
   • 23 replies
   • 12k views
   • 
   • Dnt
   • January 28, 2018

10. Trouble with the DEF warning msg. Says empty when full

    By B Hoien, December 3, 2017   

    • def warning sys
    • 1 reply
    • 7.9k views
    • 
    • Wintersun
    • January 26, 2018

11. New L5P owner love the beast

    By T DoG, January 22, 2018   

    • l5p
    • exhaust
    • (and 1 more)

      Tagged with:

      • l5p
      • exhaust
      • hum in cab
    • 0 replies
    • 2.9k views
    • 
    • T DoG
    • January 22, 2018

12. Tuned 0-80 video

    By SMiller, January 19, 2018
    • 8 replies
    • 4k views
    • 
    • SierraHD17
    • January 21, 2018

13. High Idle Regen? 1 2

    By nrsk4u, March 1, 2017   

    • regen
    • 26 replies
    • 40.4k views
    • 
    • Waaazooo
    • January 20, 2018

14. 2015 3500 High Country Diesel

    By txcowgirl, December 19, 2017
    • 4 replies
    • 1.8k views
    • 
    • avalonandl
    • January 13, 2018

15. Remapping the BCM

    By 321Gochiefs, July 18, 2017   

    • programming
    • lights
    • (and 1 more)

      Tagged with:

      • programming
      • lights
      • signals
    • 9 replies
    • 5.7k views
    • 
    • paauto
    • January 3, 2018

16. P003A

    By calgator73, December 4, 2017
    • 14 replies
    • 8.9k views
    • 
    • calgator73
    • January 2, 2018

17. Will Aftermarket Exhaust from 2011-2014 Fit a 2015?

    By KMK454, June 3, 2015
    • 13 replies
    • 3.6k views
    • 
    • SOTO3389
    • December 14, 2017

18. High oil pressure when cold

    By 2017HD, April 11, 2017
    • 9 replies
    • 28.2k views
    • 
    • redwngr
    • November 10, 2017

19. 2017 Duramax Recommends Using Only GM DEF to Avoid Problems

    By jimstringer, August 11, 2017   

    • def quality issue
    • 3 replies
    • 11k views
    • 
    • Cowpie
    • November 4, 2017

20. Pics and info 2017 2500 Duramax 1 2 3

    By Shagmax, January 28, 2017
    • 37 replies
    • 14.6k views
    • 
    • powerhaulic
    • November 3, 2017

21. CK-4 problem for Duramax?

    By calgator73, April 1, 2017
    • 10 replies
    • 9.8k views
    • 
    • Cowpie
    • October 29, 2017

22. 6.0 Exhaust ideas 1 2 3 4 6

    By chevydeth, April 10, 2016
    • 78 replies
    • 35k views
    • 
    • SierraHD17
    • October 13, 2017

23. Opinion needed

    By nicko1234, September 28, 2017
    • 9 replies
    • 1.7k views
    • 
    • 8lugCT
    • September 29, 2017

24. Driving in 4 high

    By nicko1234, August 8, 2017
    • 11 replies
    • 5.9k views
    • 
    • Chevyfeller
    • September 26, 2017

25. Mpg for new gas 2500 1 2 3 4 8

    By Capt Call, April 16, 2014
    • 116 replies
    • 74.5k views
    • 
    • TX.45
    • September 20, 2017

26. 2017 Duramax Denali problems

    By Paul303, August 24, 2017
    • 4 replies
    • 11k views
    • 
    • 2017HD
    • August 26, 2017