Engines & Powertrain (Duramax & Vortec)

227 topics in this forum

1. Regen

   By DBeau, March 9, 2019
   • 5 replies
   • 2.7k views
   • 
   • doosierra
   • August 29, 2019

2. 4l80e transmission swap to 2016 2500 Silverado

   By angel ullom, August 6, 2020
   • 5 replies
   • 11.2k views
   • 
   • Raspi
   • August 6, 2020

3. 2018 Silverado 2500 duramax electrical problems

   By Levi Sullivan, January 9, 2025
   • 5 replies
   • 7.1k views
   • 
   • Daryl Glenn
   • March 19

4. Torque converter

   By FLORIDAMK, August 2, 2019
   • 5 replies
   • 2.9k views
   • 
   • stadt11
   • November 1, 2019

5. Software Updates?? Are there any?

   By Peter Van der Lugt, April 22, 2020
   • 5 replies
   • 3.9k views
   • 
   • newdude
   • April 23, 2020

6. Short tube and long tube

   By Texas45, October 12, 2018   

   • headers
   • 2015
   • (and 4 more)

     Tagged with:

     • headers
     • 2015
     • 2500
     • 6.0
     • shorttube
     • long tube
   • 5 replies
   • 7.1k views
   • 
   • cooldude960
   • June 17, 2020

7. Can you direct me to forum re: tow package and exhaust brake use?

   By madonetwo, June 28, 2017
   • 5 replies
   • 2.6k views
   • 
   • Nathan79
   • July 14, 2017

8. Free flow catalytic converter

   By lsu33duckaholic, May 1, 2016
   • 4 replies
   • 3.2k views
   • 
   • lsu33duckaholic
   • May 2, 2016

9. 2015 GMC Sierra 3500HD SRW rear caliper torque spec

   By Matt Ziprick, August 15, 2022
   • 4 replies
   • 12.7k views
   • 
   • Tyler Gibbs
   • August 17, 2022

10. Regen notification

    By drstimpy, April 2, 2016
    • 4 replies
    • 3.3k views
    • 
    • Colossus
    • April 3, 2016

11. High Idle Switch

    By TX14Z71, April 7, 2014
    • 4 replies
    • 25.4k views
    • 
    • redwngr
    • April 11, 2014

12. Unusual DEF Behavior

    By TMac99, August 28, 2017   

    • l5p
    • def
    • 4 replies
    • 10.2k views
    • 
    • Kyres3
    • September 11, 2019

13. Buyer beware, CNG

    By CNGTruck, July 21, 2022
    • 4 replies
    • 3.4k views
    • 
    • newdude
    • September 14, 2022

14. 2015 3500 High Country Diesel

    By txcowgirl, December 19, 2017
    • 4 replies
    • 2.3k views
    • 
    • avalonandl
    • January 13, 2018

15. 2017 Duramax Denali problems

    By Paul303, August 24, 2017
    • 4 replies
    • 12.6k views
    • 
    • 2017HD
    • August 26, 2017

16. VVT issue

    By TravisLaut, February 24
    • 4 replies
    • 442 views
    • 
    • asilverblazer
    • February 25

17. V6

    By silveradosid, August 20, 2016
    • 4 replies
    • 1.8k views
    • 
    • redwngr
    • October 24, 2016

18. Supercharger on the 6.0L

    By Blazerandsierra, January 24, 2017
    • 4 replies
    • 4.1k views
    • 
    • Blazerandsierra
    • January 25, 2017

19. 2019 2500 6.6 Duramax High Idle

    By Brad Carruthers, September 25, 2020
    • 4 replies
    • 18.8k views
    • 
    • redwngr
    • September 28, 2020

20. CANADIAN SPEC 2015 2500HD LT 6L FLEXFUEL

    By David Ardin, January 13, 2020
    • 3 replies
    • 1.3k views
    • 
    • redwngr
    • January 14, 2020

21. 2018 6.6 duramax

    By Miles Brooks, April 25, 2020
    • 3 replies
    • 1.7k views
    • 
    • curver900
    • April 27, 2020

22. fuel and air filters.

    By johnnyg123, August 1, 2017
    • 3 replies
    • 2k views
    • 
    • johnnyg123
    • August 1, 2017

23. 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

24. 2017 Duramax with failed Turbo

    By Nick438w, January 9, 2017   

    • 2017
    • duramax
    • (and 2 more)

      Tagged with:

      • 2017
      • duramax
      • turbo
      • failure
    • 3 replies
    • 9.8k views
    • 
    • redwngr
    • January 29, 2017

25. 2019 GMC L5P Tuners

    By rvkeller, December 29, 2019
    • 3 replies
    • 1.6k views
    • 
    • Diver6
    • December 29, 2019