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

962 topics in this forum

1. Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) will not be available on certain 2021 model year Silverado 1500/Sierra 1500 pickups 1 2 3 4 7

   By MS3DALE, March 15, 2021
   • 92 replies
   • 59.7k views
   • 
   • SPASierra
   • May 3, 2023

3. 2021 LM2 3.0 Coolant Control Valve

   By d9gdon, December 18, 2023
   • 8 replies
   • 6k views
   • 
   • Jrat49er
   • Tuesday at 05:43 PM

4. 10 speed transmission - cover pan bolt and filter bolt

   By Philwalbridge, Monday at 03:11 PM
   • 3 replies
   • 167 views
   • 
   • newdude
   • Monday at 08:14 PM

5. 2024 GMC Sierra 1500 Elevation 2.7L Turbomax Oil Leak at 2000 Miles

   By Jason Ridge, April 10
   • 4 replies
   • 308 views
   • 
   • newdude
   • April 11

6. 2015 GMC Sierra 1500 - Unknown Misfire Issue?

   By mamarinelli, December 19, 2023   

   • gmc
   • sie
   • (and 2 more)

     Tagged with:

     • gmc
     • sie
     • coils
     • ignition
   • 4 replies
   • 1k views
   • 
   • Paul secatore
   • April 10

7. Transmission Cooler for 2021 Silverado z71 1 2

   By malibu43, December 19, 2022
   • 25 replies
   • 10.6k views
   • 
   • BigOlly83
   • April 10

8. 5.3 Dynamic fuel management 1 2 3

   By Kdn85, December 16, 2020
   • 32 replies
   • 25.2k views
   • 
   • elcamino
   • April 10

9. 2019 L84/5.3 AFM/DOD?

   By Ed Baudoux, April 4
   • 2 replies
   • 265 views
   • 
   • Ed Baudoux
   • April 8

10. The truth about oil change intervals

    By Haufski762, April 3
    • 8 replies
    • 813 views
    • 
    • Grumpy Bear
    • April 7

11. '21 Silverado 8speed Cold Shift issues

    By rgholmes08, March 29, 2021
    • 11 replies
    • 9.3k views
    • 
    • MPops
    • April 5

12. Exhaust For GMC AT4 With 6.2 Engine - Borla Touring or AWE 0FG

    By SS Crew, September 28, 2022
    • 9 replies
    • 3.7k views
    • 
    • J2Jones
    • April 4

13. Transmission issues on 2023 Sierra w/10 speed transmission

    By R MacLeod, October 13, 2023
    • 6 replies
    • 5k views
    • 
    • Bikerjon
    • April 4

14. Picking up my first Duramax, whats the recommended DEF brands? & Additives?

    By KinkyDuramax, April 1
    • 1 reply
    • 294 views
    • 
    • Jay P
    • April 2

15. GMPE & Borla

    By back_336, April 1
    • 0 replies
    • 215 views
    • 
    • back_336
    • April 1

16. 2019 1500 Transmission shutter 1 2

    By kenaparker, September 14, 2023
    • 18 replies
    • 2.5k views
    • 
    • NotoriousGT350
    • April 1

17. How to find which 10-speed transmission on 2023 Sierra 1500 Denali Ultimate 6.2L engine

    By ACinaKC, March 22
    • 9 replies
    • 808 views
    • 
    • newdude
    • March 29

18. 2022 6.2 engine failure. 1 2

    By Texas_Toast, October 10, 2023
    • 21 replies
    • 10.6k views
    • 
    • HondaHawkGT
    • March 25

19. 2023 Denali 2500 transmission valve assembly

    By Lars Ohrstrom, March 24
    • 2 replies
    • 235 views
    • 
    • Lars Ohrstrom
    • March 24

20. Exhaust Manifold Back Ordered

    By Mikes chev, February 15
    • 3 replies
    • 5.7k views
    • 
    • Mikes chev
    • March 22

21. 2016 Silverado 6L80e filter seal puller

    By SCR71822, April 24, 2022
    • 5 replies
    • 3.6k views
    • 
    • kickass audio
    • March 22

22. 2024 6.2 with active exhaust is surprising! 1 2

    By oldmann, October 10, 2023
    • 15 replies
    • 9.5k views
    • 
    • 85CJ
    • March 20

23. 2024 Silverado 5.3 misfire

    By ChrisInDallas, March 16
    • 2 replies
    • 447 views
    • 
    • Niklasbraun
    • March 19

24. Dynamic Fuel Management woes.

    By MTY55, March 17
    • 4 replies
    • 641 views
    • 
    • MTY55
    • March 18

25. Dynamic Fuel Management woes.

    By MTY55, March 17
    • 0 replies
    • 263 views
    • 
    • MTY55
    • March 17

26. Second NOx sensor failure in 1100 miles

    By DubVBenz, March 10
    • 2 replies
    • 478 views
    • 
    • redwngr
    • March 13