2019-2025 Silverado & Sierra Engine & Transmission (L3B/L82/L84/L87/LM2/LZ0)

1,039 topics in this forum

1. Borla Atak cold start/rev 5.3

   By f8l vnm, January 16, 2022
   • 5 replies
   • 1.5k views
   • 
   • Kalehuawehe2646
   • February 1, 2022

3. Engine/idle hours

   By willsep, January 25, 2022
   • 12 replies
   • 9.5k views
   • 
   • willsep
   • January 28, 2022

4. Air filter on GM Performance upgrade package

   By L87Powered, January 21, 2022
   • 5 replies
   • 2.6k views
   • 
   • Transient
   • January 26, 2022

5. 2020 Silverado w/ 3.0L diesel - new engine under warranty @ 75k miles!

   By James Eberhart, January 12, 2022
   • 8 replies
   • 4.4k views
   • 
   • James Eberhart
   • January 25, 2022

6. provocative catch can video, correction or mask of primary issues

   By customboss, January 24, 2022   

   • vvt
   • crankcase venting
   • (and 19 more)

     Tagged with:

     • vvt
     • crankcase venting
     • catch can
     • incomplete combustion
     • pcv
     • failed coils
     • direct injection
     • masking degradation
     • combustion dynamic
     • oil analysis
     • tune
     • AFM
     • DFM
     • engine oil
     • fueling
     • oil life
     • pistons
     • thermostat
     • running rich
     • running hot
     • dexos1
   • 3 replies
   • 2k views
   • 
   • txab
   • January 24, 2022

7. DEF FLUID

   By ChevySlut, December 30, 2021   

   • def
   • 6.6L Duramax
   • (and 1 more)

     Tagged with:

     • def
     • 6.6L Duramax
     • 2021 Silverado
   • 5 replies
   • 20.7k views
   • 
   • redwngr
   • January 23, 2022

8. HP Tuners 1 2

   By TNTSierra, August 8, 2020
   • 20 replies
   • 12k views
   • 
   • Dman10
   • January 23, 2022

9. Replaced muffler and flapper with this (short bullet muffler), too loud.

   By SILVER SLED, January 2, 2022
   • 13 replies
   • 2.3k views
   • 
   • SILVER SLED
   • January 19, 2022

10. 2020 Silverado w/ 3.0L diesel - new engine under warranty @ 75k miles!

    By James Eberhart, January 12, 2022
    • 2 replies
    • 1k views
    • 
    • James Eberhart
    • January 17, 2022

11. Over the air update + Pulsar LT

    By WeGone, January 15, 2022
    • 1 reply
    • 4.6k views
    • 
    • lapoolboy
    • January 15, 2022

12. Borla ATAK Muffler vs full Cat-Back System

    By Gunndy Gaming, January 5, 2022
    • 11 replies
    • 1.6k views
    • 
    • TNTSierra
    • January 15, 2022

13. LM2 3.0 running super cold on the highway mid trip

    By ian cloutier, January 3, 2022
    • 2 replies
    • 1k views
    • 
    • redwngr
    • January 12, 2022

14. 3.0 Duramax vs. 5.3 with DFM 1 2

    By lryfer, January 31, 2021
    • 22 replies
    • 17.9k views
    • 
    • KARNUT
    • January 12, 2022

15. 3.0 babymax exhaust upgrades

    By Dillydilly, January 4, 2022   

    • 3.0 liter duramax 1500
    • 7 replies
    • 2.4k views
    • 
    • redwngr
    • January 6, 2022

16. Cold start sounding different?

    By Lions3663, January 3, 2022
    • 3 replies
    • 929 views
    • 
    • Lions3663
    • January 5, 2022

17. Interesting Info on the new 3.0 Diesel

    By lennstang, January 4, 2022
    • 0 replies
    • 1.3k views
    • 
    • lennstang
    • January 4, 2022

18. smart alternator or traditional one?

    By tha hyun shin, January 3, 2022
    • 5 replies
    • 5.7k views
    • 
    • garagerog
    • January 4, 2022

19. Flowmaster Exhaust, 2019 LT 5.3 8 speed remarks.

    By Pale Rider, December 26, 2021
    • 2 replies
    • 1.3k views
    • 
    • Pale Rider
    • January 3, 2022

20. 2022 Limited AT4 wandering on highway

    By ian cloutier, January 3, 2022
    • 2 replies
    • 1.8k views
    • 
    • Kilgore Trout
    • January 3, 2022

21. 2021 GMC Bad Lifter Problem Blown Engine

    By Mark Frederick, July 30, 2021   

    • What happens after they replace does it happen again
    • 13 replies
    • 12.3k views
    • 
    • Kilgore Trout
    • January 3, 2022

22. Supercharger

    By Crspncr, January 1, 2022
    • 4 replies
    • 1.3k views
    • 
    • lapoolboy
    • January 2, 2022

23. 6.2 Muffler/ Flapper delete- not great 1 2

    By lpg, September 3, 2021
    • 24 replies
    • 23.4k views
    • 
    • GETGONE
    • January 2, 2022

24. 2020 6.2 Magnaflow 12909 Installed flappers deleted

    By HIGH ROLLIN, April 22, 2020
    • 8 replies
    • 7.4k views
    • 
    • Dman10
    • January 1, 2022

25. 3.0L Duramax 3.73 Gears 1 2

    By Eville, June 29, 2020
    • 15 replies
    • 27.5k views
    • 
    • barr8888
    • December 31, 2021

26. 3.0 Duramax DEF consumption 1 2 3 4 8

    By Firetrout, January 27, 2020
    • 108 replies
    • 107k views
    • 
    • Trubik
    • December 31, 2021