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

967 topics in this forum

1. Humming/Whining Sound on 6.2L 1 2

   By Anthony Bessel, November 12, 2022
   • 15 replies
   • 6.8k views
   • 
   • Delta Tango
   • March 9, 2023

3. Park Park comes on while driving

   By GregGreg123, March 6, 2023
   • 2 replies
   • 780 views
   • 
   • GMCustomerService
   • March 7, 2023

4. Duramax LM2 3.0l Independent Exhaust Brake Actuation

   By jdrockin, September 21, 2022
   • 5 replies
   • 5.9k views
   • 
   • silveradosid
   • March 6, 2023

5. Magnaflow 19534 - anyone try this set-up yet? 1 2

   By RCF71, December 26, 2021
   • 18 replies
   • 7.3k views
   • 
   • Brad65ford
   • March 4, 2023

6. Flowmaster American Thunder

   By Grey6.2, February 14, 2023
   • 1 reply
   • 1.2k views
   • 
   • diamondd2
   • March 2, 2023

7. Exhaust tip placement

   By bikersully, February 14, 2023
   • 1 reply
   • 1.5k views
   • 
   • jsc406
   • March 1, 2023

8. L84 can I save it ?

   By Fredo1888, February 23, 2023   

   • Silverado
   • 5.3
   • (and 3 more)

     Tagged with:

     • Silverado
     • 5.3
     • gm
     • Chevy
     • l83
   • 8 replies
   • 2.9k views
   • 
   • luke1333
   • February 25, 2023

9. Rear Diff Cover Bolts Torque Spec

   By fondupot, February 18, 2023
   • 4 replies
   • 5.1k views
   • 
   • fondupot
   • February 18, 2023

10. Rattle and Jerk

    By 20LTZ, February 9, 2023
    • 2 replies
    • 1.1k views
    • 
    • GMCustomerService
    • February 17, 2023

11. Borla Catback system ordered from factory

    By Stanley Morton, February 16, 2023
    • 3 replies
    • 1.1k views
    • 
    • Stanley Morton
    • February 17, 2023

12. 2023 GMC 1500 Sierra Denali 6.2l and DFM

    By Jus Cruisin, January 8, 2023
    • 5 replies
    • 4.9k views
    • 
    • SPASierra
    • February 14, 2023

13. Upgrade opinion 1 2

    By bowtechjoe, January 29, 2023
    • 25 replies
    • 3k views
    • 
    • Gangly
    • February 7, 2023

14. 2017 Sierra Adaptive Valve Delete

    By benelli, February 7, 2023
    • 0 replies
    • 609 views
    • 
    • benelli
    • February 7, 2023

15. 2017 Adaptive Valve Delete

    By benelli, February 7, 2023
    • 0 replies
    • 826 views
    • 
    • benelli
    • February 7, 2023

16. 0W-20 Diesel Oil Options

    By Ronjon, February 6, 2023   

    • duramax
    • 3.0l
    • (and 8 more)

      Tagged with:

      • duramax
      • 3.0l
      • 0w-20
      • diesel
      • Dexosd
      • amsoil
      • Valvoline
      • Mobile
      • acdelco
      • Castrol
    • 7 replies
    • 5.7k views
    • 
    • Ronjon
    • February 6, 2023

17. Borla ATAK Muffler vs full Cat-Back System 1 2 3

    By Gunndy Gaming, January 5, 2022
    • 30 replies
    • 8.7k views
    • 
    • NemesisC5
    • February 6, 2023

18. 3.0 long term

    By TeamSaris, January 30, 2023
    • 5 replies
    • 2.4k views
    • 
    • Ronjon
    • February 5, 2023

19. Scan tool options.

    By Tom Hoshock, January 29, 2023
    • 13 replies
    • 3.7k views
    • 
    • Tom Hoshock
    • February 5, 2023

20. 2020 1500 6.2l whining noise

    By Willsanto, February 4, 2023
    • 3 replies
    • 859 views
    • 
    • Dustin53
    • February 5, 2023

21. Regearing Trailboss 1 2

    By Blake Stiff, December 24, 2022
    • 17 replies
    • 6.1k views
    • 
    • pewterliftedz
    • February 4, 2023

22. Off-Roading with the Single Speed Transfer Case: 4.3L and 2.7L 1 2

    By Justin Holland, February 3, 2021
    • 29 replies
    • 13.9k views
    • 
    • superdashdad
    • February 4, 2023

23. Fluid Verification for 2019 Sierra Denali

    By Thomas Rodriguez, January 13, 2023
    • 1 reply
    • 939 views
    • 
    • Dan Bradley
    • January 30, 2023

24. 2.7L 4Cyl in the 2020 Sierra 1500

    By Markus Warwick, January 21, 2023
    • 3 replies
    • 1.4k views
    • 
    • fondupot
    • January 26, 2023

25. Any good extended warranties?

    By Mike Borowski, January 10, 2023
    • 4 replies
    • 1.7k views
    • 
    • Mike Borowski
    • January 26, 2023

26. Outside diameter of tailpipe on 2.7L Silverado

    By 64BAwagon, November 4, 2022
    • 3 replies
    • 4k views
    • 
    • Ludgero
    • January 23, 2023