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

965 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
   • 59.8k views
   • 
   • SPASierra
   • May 3, 2023

3. 2020 Silverado 6.2 a quart of oil every 1000 miles?

   By johnnyquick, Sunday at 07:49 PM
   • 13 replies
   • 315 views
   • 
   • Grumpy Bear
   • 2 hours ago

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

   By R MacLeod, October 13, 2023
   • 8 replies
   • 5.4k views
   • 
   • Bikerjon
   • Tuesday at 04:03 AM

5. 10 speed Transmission Hot - Please help 1 2 3 4 6

   By ArthurW, September 15, 2023
   • 80 replies
   • 8.2k views
   • 
   • ArthurW
   • Tuesday at 02:13 AM

6. 2024 3.0 duramax with NHT payload

   By Jason Clark, April 19
   • 4 replies
   • 276 views
   • 
   • GETGONE
   • Tuesday at 01:42 AM

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

   By KinkyDuramax, April 1
   • 2 replies
   • 415 views
   • 
   • HondaHawkGT
   • Monday at 10:25 PM

8. 2024 GMC Sierra 1500 Elevation 2.7L Turbomax Oil Leak at 2000 Miles

   By Jason Ridge, April 10
   • 7 replies
   • 461 views
   • 
   • silveradosid
   • Monday at 11:46 AM

9. DMAX 3.0 Code P26C0

   By Phatty, August 14, 2020
   • 6 replies
   • 3.6k views
   • 
   • mjm-1957
   • Sunday at 06:06 PM

10. P0747 - 2023 Silverado 3500HD

    By KevanG, Sunday at 12:45 AM
    • 1 reply
    • 149 views
    • 
    • 64BAwagon
    • Sunday at 12:11 PM

11. 2021 LM2 3.0 Coolant Control Valve

    By d9gdon, December 18, 2023
    • 9 replies
    • 7.3k views
    • 
    • Jake_downs
    • Sunday at 03:14 AM

12. 10 speed transmission - cover pan bolt and filter bolt

    By Philwalbridge, April 15
    • 3 replies
    • 226 views
    • 
    • newdude
    • April 15

13. 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
    • 1.1k views
    • 
    • Paul secatore
    • April 10

14. Transmission Cooler for 2021 Silverado z71 1 2

    By malibu43, December 19, 2022
    • 25 replies
    • 10.8k views
    • 
    • BigOlly83
    • April 10

15. 5.3 Dynamic fuel management 1 2 3

    By Kdn85, December 16, 2020
    • 32 replies
    • 25.5k views
    • 
    • elcamino
    • April 10

16. 2019 L84/5.3 AFM/DOD?

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

17. The truth about oil change intervals

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

18. '21 Silverado 8speed Cold Shift issues

    By rgholmes08, March 29, 2021
    • 11 replies
    • 9.5k views
    • 
    • MPops
    • April 5

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

    By SS Crew, September 28, 2022
    • 9 replies
    • 3.8k views
    • 
    • J2Jones
    • April 4

20. GMPE & Borla

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

21. 2019 1500 Transmission shutter 1 2

    By kenaparker, September 14, 2023
    • 18 replies
    • 2.6k views
    • 
    • NotoriousGT350
    • April 1

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

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

23. 2022 6.2 engine failure. 1 2

    By Texas_Toast, October 10, 2023
    • 21 replies
    • 11.8k views
    • 
    • HondaHawkGT
    • March 25

24. 2023 Denali 2500 transmission valve assembly

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

25. Exhaust Manifold Back Ordered

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

26. 2016 Silverado 6L80e filter seal puller

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