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

186 topics in this forum

1. Larger tires on 6.6 gas

   By 2011Chevy, April 30, 2020   

   • Tires
   • mpg
   • 11 replies
   • 11.6k views
   • 
   • Westy5
   • November 26, 2021

3. Dual Battrey/Dual Alternators

   By hdhp, August 31, 2021
   • 5 replies
   • 8.6k views
   • 
   • sheath
   • October 21, 2021

4. 6.6 Chirp

   By jsward12, April 19, 2021
   • 7 replies
   • 5.1k views
   • 
   • GMC4Zee
   • October 19, 2021

5. 2020 2500 transmission slipping

   By Blac, November 30, 2020
   • 9 replies
   • 9.1k views
   • 
   • ug87
   • September 24, 2021

6. Transynd instead of DEXVI?

   By THE YETI, September 11, 2021
   • 9 replies
   • 6.9k views
   • 
   • THE YETI
   • September 12, 2021

7. Anyone use CRC GDI Intake cleaner (or equiv)?

   By mrjulian416, July 14, 2021
   • 3 replies
   • 4.8k views
   • 
   • mrjulian416
   • August 23, 2021

8. Shifting from Drive to Low

   By Another JR, August 19, 2021
   • 8 replies
   • 3.4k views
   • 
   • mrjulian416
   • August 19, 2021

9. What to do? 1 2 3 4

   By MacLaren, February 25, 2021
   • 45 replies
   • 11.3k views
   • 
   • Another JR
   • August 15, 2021

10. Towing ability 1 2

    By Drumnatural, August 9, 2020
    • 18 replies
    • 13.8k views
    • 
    • Another JR
    • August 13, 2021

11. 85 vs 87 Octane

    By Frank Fontana, June 23, 2021
    • 7 replies
    • 2.9k views
    • 
    • greatmizzou
    • August 12, 2021

12. 6.6L Gas will be fine, right? 1 2 3 4 6

    By Z71RAD88, February 25, 2021
    • 83 replies
    • 25.6k views
    • 
    • finn5033
    • July 14, 2021

13. Borla catback exhaust 1 2

    By Spangled, July 26, 2020
    • 27 replies
    • 21.4k views
    • 
    • Grjfer
    • July 9, 2021

14. First Oil Change 1 2 3 4

    By texasnavy05, January 29, 2020
    • 59 replies
    • 83k views
    • 
    • Adamace1
    • June 20, 2021

15. 2020 Silverado 2500 Lt 6.6 Gas lifter problems

    By Jesus Aguirre, June 13, 2021
    • 1 reply
    • 5.6k views
    • 
    • Ray Pickle
    • June 17, 2021

16. Potential Buyer 1 2

    By uga40, April 30, 2021
    • 15 replies
    • 4.9k views
    • 
    • KARNUT
    • June 13, 2021

17. Top Tier Gas a must for our Direct Injection Engines?

    By Jimmy-Mack, May 30, 2021
    • 7 replies
    • 4.3k views
    • 
    • THE YETI
    • May 31, 2021

18. 2020 GMC 2500 6.6 GASSER leveled with 35's MPG????

    By Gabe Bunn, October 1, 2020
    • 11 replies
    • 16.2k views
    • 
    • Ryan Morgan
    • May 19, 2021

19. 6.6 Gas Tranny cooler line-CHECK

    By CRApex, March 3, 2021
    • 3 replies
    • 3.4k views
    • 
    • Another JR
    • April 22, 2021

20. Factory ordering, any updates?

    By SnowsledBen, April 5, 2021
    • 9 replies
    • 3.1k views
    • 
    • maplegrovetruck
    • April 17, 2021

21. Temp and Volt Gauge Readings - normal?

    By Jimmy-Mack, March 28, 2021
    • 8 replies
    • 3.9k views
    • 
    • Wxman
    • April 13, 2021

22. At4 vs Denali ride quality

    By CaptainMorganNC, March 13, 2021
    • 14 replies
    • 16.3k views
    • 
    • MTU Alum
    • April 9, 2021

23. Sulfur smell

    By jsward12, April 8, 2021
    • 0 replies
    • 1k views
    • 
    • jsward12
    • April 8, 2021

24. 2022 Release

    By CaptainMorganNC, March 23, 2021
    • 8 replies
    • 7.3k views
    • 
    • SnowsledBen
    • April 5, 2021

25. L8T 6.6L Capabilities

    By C/K Man, February 10, 2021
    • 3 replies
    • 3.8k views
    • 
    • Sierra Jon
    • March 23, 2021

26. Shopping for a new HD truck. 1 2 3

    By Bikemobile, December 26, 2020
    • 31 replies
    • 8.3k views
    • 
    • kenny_r
    • March 21, 2021