Engines & Drivetrain (V8, Duramax, TurboMax)

1,140 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
   • 77.9k views
   • 
   • Silver Yeti
   • June 11

2. Me too……..

   By mark1968, Tuesday at 11:02 AM
   • 0 replies
   • 146 views
   • 
   • mark1968
   • Tuesday at 11:02 AM

3. 2024 silverado 6.2 just went down 1 2

   By marsh deacon, June 4
   • 16 replies
   • 1.2k views
   • 
   • Coastie05
   • Sunday at 02:04 AM

4. Auto start stop disable

   By revmanii, June 16
   • 4 replies
   • 673 views
   • 
   • Gregory Coleman
   • July 10

5. Low Diff fluid

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

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

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

7. Another 6.2L engine failure! 1 2 3

   By Stevens54, April 29, 2024
   • 37 replies
   • 30.9k views
   • 
   • MASONV88888888
   • June 28

8. Missing thrust bearing? And oil selection 1 2

   By Atlas, June 22   

   • 3.0 Duramax ONLY
   • Not for Honda Odyssey Owners
   • 17 replies
   • 1k views
   • 
   • KARNUT
   • June 24

9. VIN PLACEMENT

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

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

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

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

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

12. 2019 Chevy Silverado 6.2 10Speed

    By TunedTorres, April 30, 2025
    • 3 replies
    • 1k views
    • 
    • Chevy Man for Life
    • June 12

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

    By Cigarette1AT4, January 17, 2022
    • 32 replies
    • 33k views
    • 
    • Mgyselinckjr
    • June 9

14. 2023 Silverado 3.0L Duramax Transmission/Engine problems

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

15. Should I Be Worried?

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

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

    By goin2drt, May 7
    • 7 replies
    • 1.2k views
    • 
    • goin2drt
    • May 28

17. 2023 silverado Transfer case fluid

    By JCA, January 18, 2023
    • 10 replies
    • 9.3k views
    • 
    • Black02Silverado
    • May 26

18. 0-Cylinder mode while coasting

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

19. Transmission anxiety

    By 2020truck, April 21
    • 9 replies
    • 1.2k views
    • 
    • newdude
    • May 13

20. Motor mounts gone at 70,000 miles 1 2

    By bwsaco, April 18
    • 17 replies
    • 1.2k views
    • 
    • DubVBenz
    • May 7

21. 2024 GMC Elevation 5.3 w/10 speed transmission. Reverse issues

    By Robby B, August 13, 2024
    • 7 replies
    • 5k views
    • 
    • 66ss3964spd
    • May 2

22. 2020 LM2 stretched timing chain.. <80K miles! GM needs to step up

    By BlueDMax, April 26
    • 5 replies
    • 615 views
    • 
    • BlueDMax
    • April 29

23. Shame on GM! 6.2 V8 Serpentine Belt

    By Transient, April 16
    • 6 replies
    • 891 views
    • 
    • NavyVette
    • April 19

24. 2019 Sierra AT4 5.3 engine failure

    By Dabco, April 17
    • 4 replies
    • 689 views
    • 
    • silveradosid
    • April 18

25. Oil cooler lines again….

    By DHBWA, August 26, 2025
    • 7 replies
    • 1.5k views
    • 
    • K455
    • April 13