Engines & Powertrain (Duramax & Vortec)

227 topics in this forum

1. 6.2L gas versus 6.6L Duramax 1 2 3

   By wickedone, August 31, 2014
   • 39 replies
   • 137.6k views
   • 
   • Cowpie
   • February 8, 2015

2. Towing with 6.0 Engine? Or Do I Really Need A Diesel? 1 2 3 4 7

   By Whip, July 12, 2015
   • 90 replies
   • 130.9k views
   • 
   • magnum74
   • May 28, 2017

3. Which Engine Oil (conventional or synthetic) 1 2 3 4

   By WireBender, June 18, 2017
   • 51 replies
   • 100.7k views
   • 
   • edktm
   • November 5, 2019

4. Code P21DD (Reductant Tank Heater)

   By TinkeringFox, October 15, 2018   

   • def
   • p21dd
   • (and 12 more)

     Tagged with:

     • def
     • p21dd
     • reductant
     • tank
     • heater
     • circuit
     • low
     • lml
     • cold
     • start
     • engine
     • def tank heater
     • reductant tank heater
     • fluid
   • 3 replies
   • 89.9k views
   • 
   • jjwest64
   • December 18, 2020

5. DEF heater failure and engine light 1 2

   By Jnich17, November 10, 2017   

   • 2015 duramax
   • 28 replies
   • 89.1k views
   • 
   • JLP01
   • March 16, 2022

6. 2017 model year = new Duramax engine 1 2

   By 2018GMC, November 20, 2013
   • 25 replies
   • 82.8k views
   • 
   • Chevy man 72
   • April 15, 2016

7. 2017 Duramax Recommends Using Only GM DEF to Avoid Problems 1 2

   By jimstringer, August 11, 2017   

   • def quality problem
   • 22 replies
   • 78.1k views
   • 
   • John Gillette
   • August 13, 2022

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

   By Capt Call, April 16, 2014
   • 116 replies
   • 77.3k views
   • 
   • TX.45
   • September 20, 2017

9. Reverse lights in towing mirror 1 2 3

   By Lon Bossom, November 19, 2017
   • 39 replies
   • 63.4k views
   • 
   • Redpanda123
   • July 3, 2021

10. Removing emissions controls 1 2 3

    By austingta, August 21, 2016
    • 37 replies
    • 59.3k views
    • 
    • X25
    • January 11, 2017

11. 6.0 gas engine 1 2 3 4 11

    By cat320, November 3, 2014
    • 157 replies
    • 55.5k views
    • 
    • SierraHD17
    • April 15, 2018

12. 2018 L5P sudden loss of power and shut off

    By 480Ruger, May 22, 2018   

    • l5p
    • loss of power
    • (and 1 more)

      Tagged with:

      • l5p
      • loss of power
      • 2018
    • 9 replies
    • 47.5k views
    • 
    • redwngr
    • November 25, 2020

13. 6.0 oil change interval 1 2 3 4

    By 07Serria, October 7, 2018
    • 53 replies
    • 47.5k views
    • 
    • Cowpie
    • February 8, 2019

14. High Idle Regen? 1 2

    By nrsk4u, March 1, 2017   

    • regen
    • 26 replies
    • 46.3k views
    • 
    • Waaazooo
    • January 20, 2018

15. Cam Swap 2015 6.0 1 2

    By JesseJames94, October 6, 2017
    • 21 replies
    • 45.1k views
    • 
    • shakenfake
    • January 27, 2022

16. 2500HD 6.0 oil 1 2 3

    By T_ClarkEx39, September 15, 2017
    • 34 replies
    • 44.9k views
    • 
    • Cowpie
    • March 3, 2018

17. 2018 L5P codes. P129F & P228C

    By Danny R, November 27, 2020
    • 11 replies
    • 41.1k views
    • 
    • Bdock1981
    • May 19, 2024

18. Tuner for 2015 Silverado 2500 6.0L 1 2

    By Cmillerjr, January 18, 2016
    • 23 replies
    • 39.4k views
    • 
    • Jennabear
    • August 11, 2016

19. 6.0 Exhaust ideas 1 2 3 4 6

    By chevydeth, April 10, 2016
    • 78 replies
    • 38.9k views
    • 
    • SierraHD17
    • October 13, 2017

20. DEF Delete

    By TX14Z71, April 6, 2014
    • 7 replies
    • 36.3k views
    • 
    • redwngr
    • April 11, 2014

21. High oil pressure when cold

    By 2017HD, April 11, 2017
    • 9 replies
    • 35.9k views
    • 
    • redwngr
    • November 10, 2017

22. Trans fluid change in 2015 2500hd 6.0

    By ryanhardy, March 19, 2018
    • 7 replies
    • 35.5k views
    • 
    • Cowpie
    • April 8, 2018

23. Fuel Mileage L5P 1 2

    By Peterd, July 23, 2017
    • 22 replies
    • 33.1k views
    • 
    • doosierra
    • August 29, 2019

24. Diesel Regeneration 1 2 3

    By Whip, July 12, 2015
    • 37 replies
    • 32.8k views
    • 
    • avalonandl
    • February 4, 2019

25. Duramax oil leak

    By calgator73, November 20, 2016
    • 11 replies
    • 30.2k views
    • 
    • Colossus
    • November 29, 2016