6.6L Duramax Diesel & Allison Powertrain (L5P/MGM)

99 topics in this forum

1. Emissions System Error

   By H.B. Shannon, Tuesday at 12:46 AM
   • 0 replies
   • 97 views
   • 
   • H.B. Shannon
   • Tuesday at 12:46 AM

3. What did you pay for your 2020 truck 1 2 3

   By Ronnell Roegner, July 11, 2020
   • 41 replies
   • 9,243 views
   • 
   • cNate
   • Saturday at 04:47 AM

4. Tires rotation and tpms issues

   By Newduramaxh*ar, April 15
   • 1 reply
   • 169 views
   • 
   • redwngr
   • April 15

5. fifth wheel hitch

   By Mardo, March 13
   • 10 replies
   • 917 views
   • 
   • Erny
   • April 12

6. Need Deleted L5P Advice

   By Brozat4, January 30
   • 8 replies
   • 1,326 views
   • 
   • Brozat4
   • April 11

7. 2021 2500 AT4 payload

   By Mardo, March 11
   • 4 replies
   • 758 views
   • 
   • rblanch
   • March 26

8. 3 inch cognito lift

   By ND763, March 24
   • 1 reply
   • 328 views
   • 
   • gSwift
   • March 25

9. 2020 Silverado 2500 DEF usage 1 2 3 4 5

   By gjohnston7, June 3, 2020
   • 64 replies
   • 19,133 views
   • 
   • XY74
   • March 19

10. Problem with intel beam not working

    By BenJG, March 15
    • 9 replies
    • 500 views
    • 
    • RugbyRef
    • March 16

11. Exhaust brake or lack there of... need others opinion on this?

    By firedab, March 11, 2020
    • 13 replies
    • 4,103 views
    • 
    • Wyoming 3500
    • March 12

12. Game Changer - Banks PedalMonster

    By u3putt, January 21
    • 10 replies
    • 2,208 views
    • 
    • jhplak325
    • March 1

13. 2021 DMAX - cold temp issues?

    By ArrowsmithPML, February 12
    • 13 replies
    • 1,349 views
    • 
    • redwngr
    • February 26

14. Oil

    By mostcorey95, February 16
    • 3 replies
    • 794 views
    • 
    • Grumpy Bear
    • February 20

15. 2021 DMAX - cold temp issues? 1 2

    By ArrowsmithPML, February 10
    • 16 replies
    • 1,369 views
    • 
    • ArrowsmithPML
    • February 16

16. Regen?

    By Njmurvin, September 9, 2020
    • 11 replies
    • 1,888 views
    • 
    • ahartzell2020
    • February 14

17. 2020 Duramax Cold start tick

    By combat1500, February 10
    • 1 reply
    • 568 views
    • 
    • Colossus
    • February 12

18. High Idle

    By gSwift, July 13, 2020
    • 13 replies
    • 9,635 views
    • 
    • leverett.scott
    • February 7

19. Leaking Diesel Fuel when topping off the tank

    By Rguerra, December 1, 2020
    • 11 replies
    • 1,587 views
    • 
    • Rguerra
    • January 28

20. 2020 GMC 3500 SINGLE AXLE AT4 CREW 1 2

    By jojo ma, May 31, 2020   

    • AT4
    • 3500
    • (and 2 more)

      Tagged with:

      • AT4
      • 3500
      • BATTERY
      • adaptive cruise control
    • 16 replies
    • 4,795 views
    • 
    • rauan
    • January 27

21. 2020 6.6 D-max towing MPG 1 2

    By Lfod1836, December 4, 2019
    • 28 replies
    • 9,182 views
    • 
    • rauan
    • January 27

22. Engine operating temp

    By Jfg1300, December 21, 2020
    • 7 replies
    • 1,035 views
    • 
    • Keith_Schumaker
    • January 24

23. Silverado 2500HD Issue

    By TFern, December 18, 2020
    • 11 replies
    • 2,076 views
    • 
    • u3putt
    • January 15

24. Auto Grade Brake 1 2

    By JRSPerf., November 14, 2020
    • 18 replies
    • 2,269 views
    • 
    • CAMPINGCPL
    • January 14

25. Winter fuel for L5P

    By COB II, December 21, 2020
    • 3 replies
    • 1,150 views
    • 
    • u3putt
    • January 8

26. Air bags

    By inquenciocha, December 28, 2020
    • 3 replies
    • 770 views
    • 
    • rblanch
    • January 7