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Forum: Duramax 6600

Welcome to the Internet's first Duramax 6600 diesel discussion forum for the LB7, LLY, LBZ, LMM, LML, LGH & L5P RPO code engines. Tips on performance, fuel economy, troubleshooting and more.

  1. Sticky Thread Sticky: Dexcool vs. other coolants

    Started by TomJ01, 12-01-2010 16:01
    • Replies: 14
    • Views: 72,603
    10-28-2020, 13:47 Go to last post
  2. Sticky Thread Sticky: Additional fuel filtration / injector replacement poll

    Started by Mark Rinker, 08-16-2008 09:10
    2 Pages
    1 2
    • Replies: 29
    • Views: 37,600
    10-04-2020, 03:07 Go to last post
  3. Sticky Thread Sticky: Gasoline in my 6.6 Duramax

    Started by Javy, 06-01-2006 18:36
    2 Pages
    1 2
    • Replies: 32
    • Views: 75,192
    05-21-2020, 11:15 Go to last post
  4. Poll Sticky Thread Sticky: Poll: 2004.5+ LLY Duramax Fuel Economy Poll

    Started by More Power, 12-31-2004 14:27
    6 Pages
    1 2 3 ... 6
    • Replies: 117
    • Views: 107,058
    10-29-2018, 12:13 Go to last post
  5. Sticky Thread Sticky: P0087 fuel rail pressure low limp under high loads

    Started by Mark Rinker, 08-14-2009 20:26
    12 Pages
    1 2 3 ... 12
    • Replies: 223
    • Views: 280,690
    03-18-2018, 04:55 Go to last post
  6. Sticky Thread Sticky: High Miles contest!

    Started by More Power, 11-29-2005 07:23
    6 Pages
    1 2 3 ... 6
    • Replies: 102
    • Views: 100,752
    10-23-2017, 11:59 Go to last post
  7. Sticky Thread Sticky: 2001 LB7 fuel system/limp mode problem SOLVED

    Started by maverick2, 04-09-2010 12:46
    • Replies: 18
    • Views: 63,216
    10-23-2017, 07:57 Go to last post
  8. Sticky Thread Sticky: DTC Codes-Definitions

    Started by MAV, 09-27-2003 06:24
    • Replies: 7
    • Views: 43,759
    09-07-2017, 16:45 Go to last post
  9. Sticky Thread Sticky: LBZ Fuel Mileage

    Started by Dannyboy, 03-10-2006 15:46
    9 Pages
    1 2 3 ... 9
    • Replies: 166
    • Views: 155,792
    03-27-2017, 08:13 Go to last post
  10. Arrow Sticky Thread Sticky: LML Fuel Economy

    Started by cowboywildbill, 04-29-2011 06:46
    • Replies: 18
    • Views: 45,256
    07-13-2016, 07:27 Go to last post
  11. Poll Sticky Thread Sticky: Poll: 2001-early 2004 LB7 Duramax Fuel Economy Poll

    Started by More Power, 12-31-2004 14:35
    6 Pages
    1 2 3 ... 6
    • Replies: 113
    • Views: 177,923
    01-19-2016, 14:50 Go to last post
  12. Arrow Sticky Thread Sticky: LMM Fuel Economy

    Started by More Power, 04-11-2007 22:20
    5 Pages
    1 2 3 ... 5
    • Replies: 98
    • Views: 118,252
    01-24-2013, 06:38 Go to last post
  13. Sticky Thread Sticky: Maximizing LLY fuel mileage

    Started by Stlheadake, 05-17-2006 11:32
    3 Pages
    1 2 3
    • Replies: 58
    • Views: 73,076
    11-29-2012, 16:34 Go to last post
  14. Sticky Thread Sticky: New to Forum: How to tell type of Engine

    Started by bradjedis, 06-18-2007 10:41
    • Replies: 11
    • Views: 41,605
    03-23-2010, 10:03 Go to last post
  15. Thumbs up Sticky Thread Sticky: D Max Express Fuel Mileage

    Started by wurk_truk, 04-28-2006 21:40
    • Replies: 10
    • Views: 43,929
    06-21-2008, 16:16 Go to last post
    • Replies: 4
    • Views: 28,052
    01-03-2008, 19:45 Go to last post
  16. Sticky Thread Sticky: Postings in the 'Duramax 6600' forum

    Started by Mark Rinker, 08-03-2007 07:58
    • Replies: 0
    • Views: 13,519
    08-03-2007, 07:58 Go to last post
  1. Question: Old or New?

    Started by Vetman7, 05-11-2021 04:29
    • Replies: 1
    • Views: 32
    05-11-2021, 10:45 Go to last post
  2. How to diagnose GP Controler on LBZ

    Started by a5150nut, 11-03-2019 13:05
    • Replies: 7
    • Views: 660
    05-10-2021, 16:33 Go to last post
  3. Loosing coolant -no leaks found

    Started by Johnm1, 05-10-2021 06:59
    • Replies: 0
    • Views: 19
    05-10-2021, 06:59 Go to last post
  4. Battery died

    Started by a5150nut, 04-23-2021 08:28
    • Replies: 12
    • Views: 134
    04-25-2021, 12:36 Go to last post
  5. Loose shifter

    Started by DIESEL/VETTE, 04-11-2021 08:22
    • Replies: 3
    • Views: 79
    04-12-2021, 21:36 Go to last post
  6. Pinout needed

    Started by a5150nut, 03-30-2021 17:53
    • Replies: 1
    • Views: 61
    03-30-2021, 21:50 Go to last post
  7. 2001 Lb7 Injector Command rates

    Started by BoomBoom5t4, 03-26-2021 19:44
    • Replies: 0
    • Views: 57
    03-26-2021, 19:44 Go to last post
  8. Marvel Mystery Oil question...

    Started by spongebob, 12-11-2020 11:08
    • Replies: 7
    • Views: 338
    03-15-2021, 14:34 Go to last post
  9. Scan apps

    Started by a5150nut, 01-24-2021 16:09
    • Replies: 0
    • Views: 103
    01-24-2021, 16:09 Go to last post
  10. emissions ready monitors, 2017 L5P

    Started by chessy56, 10-06-2020 11:17
    • Replies: 10
    • Views: 408
    01-09-2021, 13:49 Go to last post
    • Replies: 3
    • Views: 178
    12-07-2020, 11:06 Go to last post
  11. Helpppp!!!

    Started by Jasonooooo, 11-18-2020 23:19
    • Replies: 8
    • Views: 303
    11-20-2020, 14:10 Go to last post
  12. Angry LEAKING Air Con Condenser

    Started by Dek Hawkins, 09-24-2020 13:45
    • Replies: 8
    • Views: 320
    11-13-2020, 13:26 Go to last post
  13. Cooling fluid ??

    Started by spongebob, 10-24-2020 15:53
    • Replies: 4
    • Views: 157
    10-29-2020, 08:10 Go to last post
  14. Using a cleaner in the oil...

    Started by spongebob, 10-10-2020 16:32
    • Replies: 5
    • Views: 194
    10-29-2020, 08:01 Go to last post
  15. EGR removal pro’s/con’s

    Started by spongebob, 10-26-2020 10:45
    • Replies: 2
    • Views: 118
    10-26-2020, 12:07 Go to last post
  16. P0402 code

    Started by spongebob, 10-24-2020 11:29
    • Replies: 5
    • Views: 151
    10-26-2020, 10:46 Go to last post
  17. DEF Life

    Started by richp, 10-24-2020 10:25
    • Replies: 8
    • Views: 215
    10-25-2020, 04:03 Go to last post
  18. SES and P0106, P0402

    Started by Mark Rinker, 02-14-2009 08:22
    • Replies: 15
    • Views: 6,808
    10-24-2020, 11:27 Go to last post
  19. Unhappy Yet another injector question...

    Started by Vetman7, 04-29-2019 07:40
    2 Pages
    1 2
    • Replies: 20
    • Views: 3,526
    10-21-2020, 09:54 Go to last post

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