6.6L (LML/L5P) & 6.0L (L96/LC8) Tech

224 topics in this forum

1. No power all the sudden .parked went inside came out and nothing no dash no crank nothing dead completely 9

   By Delaney Kerr, January 16
   • 0 replies
   • 671 views
   • 
   • Delaney Kerr
   • January 16

3. two chimes vs one chime when I turn on ignition

   By Reggie Belanger, January 3   

   • 2019 Sierra 2500HD Duramax
   • 0 replies
   • 502 views
   • 
   • Reggie Belanger
   • January 3

4. Shifting issues

   By jacob keese, June 29, 2023
   • 0 replies
   • 1.1k views
   • 
   • jacob keese
   • June 29, 2023

5. No lights L5P back to shop

   By Jackie Emery Andrus, June 19, 2023   

   • Warranty
   • l5p
   • (and 2 more)

     Tagged with:

     • Warranty
     • l5p
     • mirrors
     • Emission System Error Code
   • 0 replies
   • 1.2k views
   • 
   • Jackie Emery Andrus
   • June 19, 2023

6. Manual shifting not working

   By Ryan Fischer, May 29, 2023
   • 0 replies
   • 1.4k views
   • 
   • Ryan Fischer
   • May 29, 2023

7. wont start without ether please help

   By TRAVOSE20, April 11, 2023
   • 0 replies
   • 1.5k views
   • 
   • TRAVOSE20
   • April 11, 2023

8. MAP Sensor cage.

   By BNSF, April 1, 2023
   • 1 reply
   • 2.2k views
   • 
   • foamy
   • September 7, 2023

9. coils and wires

   By dynoray, March 16, 2023
   • 0 replies
   • 1.8k views
   • 
   • dynoray
   • March 16, 2023

10. Fuel gauge sticking.

    By Mike Hamm, September 1, 2022
    • 0 replies
    • 2.1k views
    • 
    • Mike Hamm
    • September 1, 2022

11. 2015 GMC Sierra 3500HD SRW rear caliper torque spec

    By Matt Ziprick, August 15, 2022
    • 4 replies
    • 4.7k views
    • 
    • Tyler Gibbs
    • August 17, 2022

12. Buyer beware, CNG

    By CNGTruck, July 21, 2022
    • 4 replies
    • 2.8k views
    • 
    • newdude
    • September 14, 2022

13. Worth buying high mileage trucks?

    By Katkinson1112, May 1, 2022
    • 12 replies
    • 10.6k views
    • 
    • white bread
    • August 15, 2023

14. Glow plug that is haunted lol

    By topdj, April 2, 2022
    • 0 replies
    • 2.3k views
    • 
    • topdj
    • April 2, 2022

15. start engine to view application

    By LabOne, March 5, 2022
    • 0 replies
    • 2.3k views
    • 
    • LabOne
    • March 5, 2022

16. Service theft deterrent system

    By Trevo-all, November 6, 2021
    • 0 replies
    • 4.1k views
    • 
    • Trevo-all
    • November 6, 2021

17. The great debate…. L5P oil

    By MichDirtyMax19, November 3, 2021
    • 6 replies
    • 4.2k views
    • 
    • Grumpy Bear
    • November 4, 2021

18. 2018 GMC Sierra Duramax 6.6

    By rvillaverde, October 20, 2021
    • 0 replies
    • 6.5k views
    • 
    • rvillaverde
    • October 20, 2021

19. Shell Rotella T6 15-40

    By gmacecsko, October 18, 2021
    • 2 replies
    • 3.4k views
    • 
    • pokismoki
    • October 18, 2021

20. Crank but no start

    By Btreadway2003, October 17, 2021
    • 0 replies
    • 3.1k views
    • 
    • Btreadway2003
    • October 17, 2021

21. Code P2297 oxygen sensor (O2) has out of range sensor performance when the vehicle is decelerating for bank 1 sensor 1

    By Robert Hahn, September 22, 2021
    • 0 replies
    • 4.8k views
    • 
    • Robert Hahn
    • September 22, 2021

22. No power to driver side lowbeam

    By Scott77, September 21, 2021
    • 0 replies
    • 1.3k views
    • 
    • Scott77
    • September 21, 2021

23. No power to driver side lowbeam

    By Scott77, September 21, 2021
    • 1 reply
    • 1.5k views
    • 
    • shakenfake
    • September 21, 2021

24. DEF question

    By Sumrtime, August 1, 2021
    • 12 replies
    • 2.4k views
    • 
    • CamGTP
    • August 5, 2021

25. Block Heater Short Recall

    By 2017HD, July 27, 2021
    • 2 replies
    • 4.9k views
    • 
    • gmacecsko
    • October 18, 2021

26. L5p buying guide

    By Lspoo19, April 28, 2021
    • 0 replies
    • 2.2k views
    • 
    • Lspoo19
    • April 28, 2021