Engines & Drivetrain (V8, Duramax, TurboMax)

1,144 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
   • 99 replies
   • 78.4k views
   • 
   • Silver Yeti
   • June 11

2. 2026 TurboMax L3B 2.7L: AFM/DFM present/disablable? [2026 Silverado 1500WT: 4WD RC RB 2.7L]3GCNKAEK9TG345558

   By bwiese, July 29
   • 5 replies
   • 356 views
   • 
   • newdude
   • 13 hours ago

3. Range RA007 DFM Module

   By lowrider, July 30
   • 2 replies
   • 294 views
   • 
   • jaszr2
   • Yesterday at 06:29 AM

4. Me too……..

   By mark1968, July 14
   • 9 replies
   • 707 views
   • 
   • mark1968
   • July 30

5. No 12v outlets in 2026 gmc Sierra

   By steve3661, February 14
   • 14 replies
   • 3.5k views
   • 
   • bwiese
   • July 29

6. Transmission Temperature Hitting 220s 1 2

   By DustMcGrath, July 24
   • 16 replies
   • 900 views
   • 
   • TrueBlue
   • July 27

7. Transmission temperature 10speed with 3.0 LZO Duramax 1 2 3 4 5

   By steve king, April 9, 2023
   • 63 replies
   • 46.7k views
   • 
   • Rick_
   • July 24

8. Auto start stop disable

   By revmanii, June 16
   • 5 replies
   • 953 views
   • 
   • kr477
   • July 20

9. 2020 Trailboss 6.2 replacement

   By 2017Z, July 18
   • 3 replies
   • 364 views
   • 
   • newdude
   • July 20

10. 2024 silverado 6.2 just went down 1 2

    By marsh deacon, June 4
    • 16 replies
    • 1.5k views
    • 
    • Coastie05
    • July 12

11. Low Diff fluid

    By jumbo-slaw, June 29
    • 1 reply
    • 350 views
    • 
    • jumbo-slaw
    • June 29

12. Replacing 2.7L on 2021 Silverado with 2023 2.7L

    By jmajor422, June 12
    • 6 replies
    • 581 views
    • 
    • silveradosid
    • June 28

13. Another 6.2L engine failure! 1 2 3

    By Stevens54, April 29, 2024
    • 37 replies
    • 31.3k views
    • 
    • MASONV88888888
    • June 28

14. Missing thrust bearing? And oil selection 1 2

    By Atlas, June 22   

    • 3.0 Duramax ONLY
    • Not for Honda Odyssey Owners
    • 17 replies
    • 1.2k views
    • 
    • KARNUT
    • June 24

15. VIN PLACEMENT

    By PUSSLEGUT, June 22
    • 6 replies
    • 637 views
    • 
    • PUSSLEGUT
    • June 22

16. Trans Cooler Thermostat Valve Body Seals - 2022 10L80

    By Rick_, June 18
    • 3 replies
    • 294 views
    • 
    • Rick_
    • June 18

17. Looking at 2022.5+ Silverado/Sierra 1500 (5.3L) - Lifter/DFM Question

    By forgetaboudit, June 17
    • 3 replies
    • 496 views
    • 
    • asilverblazer
    • June 17

18. 2019 Chevy Silverado 6.2 10Speed

    By TunedTorres, April 30, 2025
    • 3 replies
    • 1.1k views
    • 
    • Chevy Man for Life
    • June 12

19. Is 5.3 fuel mileage really this bad? 1 2 3

    By Cigarette1AT4, January 17, 2022
    • 32 replies
    • 33.5k views
    • 
    • Mgyselinckjr
    • June 9

20. 2023 Silverado 3.0L Duramax Transmission/Engine problems

    By Texas_Mike713, May 11
    • 2 replies
    • 1k views
    • 
    • GMCustomerService
    • June 4

21. Should I Be Worried?

    By Dennis1947, May 23
    • 5 replies
    • 787 views
    • 
    • GMCustomerService
    • June 1

22. Is the 6.2L L87 in a 2026 Sierra 1500 ok?

    By goin2drt, May 7
    • 7 replies
    • 1.5k views
    • 
    • goin2drt
    • May 28

23. 2023 silverado Transfer case fluid

    By JCA, January 18, 2023
    • 10 replies
    • 9.6k views
    • 
    • Black02Silverado
    • May 26

24. 0-Cylinder mode while coasting

    By TrueBlue, May 22
    • 6 replies
    • 747 views
    • 
    • Grumpy Bear
    • May 23

25. Transmission anxiety

    By 2020truck, April 21
    • 9 replies
    • 1.3k views
    • 
    • newdude
    • May 13