6.6L Gas V8 & HD Transmission Powertrain (L8T/MYD)

126 topics in this forum

1. 6.6 Direct Injection Reliability Concerns

   By Khoa Pham, January 18, 2021
   • 10 replies
   • 12.5k views
   • 
   • Ray Pickle
   • 22 hours ago

3. WT (or Pro), dlb cab long bed gasser availability, Please Educate Me

   By Austin66, March 23
   • 11 replies
   • 436 views
   • 
   • Austin66
   • Tuesday at 10:07 PM

4. 6.6 - Catch Can - Final Answer 1 2

   By 6.6HD, February 18, 2021
   • 17 replies
   • 7.6k views
   • 
   • Jettech1
   • Monday at 10:24 PM

5. L8T In Silverado Medium Duty

   By C/K Man, March 23
   • 0 replies
   • 128 views
   • 
   • C/K Man
   • March 23

6. 6.6 Gas/10 spd 0-60 video

   By CRApex, March 21
   • 5 replies
   • 382 views
   • 
   • XY74
   • March 21

7. Brand new truck-Transmission issues 1 2

   By H20ENG, April 30, 2022
   • 27 replies
   • 3.8k views
   • 
   • GMC4Zee
   • March 21

8. 2023 6.6 Gas Real World Towing Observations 1 2 3

   By SWDoodle, January 6
   • 38 replies
   • 3.8k views
   • 
   • Ray Pickle
   • March 21

9. Pros and Cons of Installing Later Transmission Thermostat with Lower Opening Temperature 1 2 3 4 6

   By Another JR, August 16, 2022
   • 76 replies
   • 4.8k views
   • 
   • Grumpy Bear
   • March 16

10. 2024 GMC 2500 AT4 Gas 1 2 3

    By SWDoodle, February 27
    • 36 replies
    • 1.9k views
    • 
    • Doodle
    • March 16

11. WDH or not on 1-Ton Trucks 1 2 3 4 7

    By Dr1ft3r, February 20   

    • weight distribution hitch
    • 103 replies
    • 3.5k views
    • 
    • Jettech1
    • March 14

12. Add engine oil!!! 1 2 3 4 14

    By Truston Gunter, December 15, 2021
    • 198 replies
    • 29.9k views
    • 
    • Pryme
    • March 7

13. 6.6L programmer 1 2

    By Snorat, November 19, 2020
    • 19 replies
    • 37k views
    • 
    • davester
    • February 24

14. GM 6L90 and 6L90E Transmission

    By rileyc, February 15
    • 1 reply
    • 552 views
    • 
    • newdude
    • February 15

15. Concerns with 6 speed transmission vs 10 speed transmission? 1 2 3 4

    By Gabe Bunn, September 21, 2021
    • 46 replies
    • 24k views
    • 
    • Jettech1
    • February 12

16. I would like to start a NEW catch can post for all to follow. 1 2 3 4 6

    By Jettech1, January 30
    • 77 replies
    • 4.4k views
    • 
    • Jettech1
    • February 11

17. Trying to do what the manual says 1 2

    By Gary Camille, February 7
    • 27 replies
    • 842 views
    • 
    • Jettech1
    • February 7

18. Downshifting while slowing down in Tow/Haul Mode 1 2

    By Lenny_B, September 1, 2022
    • 22 replies
    • 3.1k views
    • 
    • XY74
    • January 31

19. Catch can anybody running one on the new HD 1 2 3 4

    By 2020_3500HD, August 22, 2020
    • 48 replies
    • 20.2k views
    • 
    • Pryme
    • January 30

20. Cold start one second long awful engine sound 1 2 3 4 5

    By Jettech1, December 1, 2022
    • 68 replies
    • 3.5k views
    • 
    • the wanderer
    • January 29

21. Giving the gas motor a shot 1 2

    By CRApex, January 16
    • 24 replies
    • 2.1k views
    • 
    • Jettech1
    • January 28

22. Denali vs. AT4 or SLT ride quality difference ?

    By jd720, January 14
    • 12 replies
    • 1.2k views
    • 
    • BB&Chiveon
    • January 24

23. Oil Consumption 1 2

    By waltman, January 12
    • 18 replies
    • 2.1k views
    • 
    • Pryme
    • January 23

24. Towing range and usuable fuel amount

    By greatmizzou, July 22, 2020
    • 12 replies
    • 4k views
    • 
    • Jettech1
    • January 21

25. Noise at idle 2022 silverado 2500 gasser

    By HDroofer, December 31, 2022
    • 3 replies
    • 763 views
    • 
    • GMCustomerService
    • January 9

26. 2022 silverado 2500 gasser operating temp

    By HDroofer, December 29, 2022
    • 9 replies
    • 693 views
    • 
    • HDroofer
    • January 1