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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. Wink Sticky Thread Sticky: Duramax Head Gasket Replacement

    Started by More Power, 05-31-2021 06:10
    8 Pages •
    1 2 3 ... 8
    duramax, head gasket replacement
    • Replies: 142
    • Views: 197,054
    More Power
    04-10-2025, 09:53 Go to last post

  2. Sticky Thread Sticky: High Miles contest!

    Started by More Power, 11-29-2005 07:23
    6 Pages •
    1 2 3 ... 6
    6 Attachment(s)
    • Replies: 107
    • Views: 247,264
    R2b
    02-29-2024, 13:38 Go to last post

  3. Sticky Thread Sticky: LBZ Fuel Mileage

    Started by Dannyboy, 03-10-2006 15:46
    9 Pages •
    1 2 3 ... 9
    • Replies: 168
    • Views: 372,124
    a5150nut
    12-30-2023, 15:22 Go to last post

  4. Thumbs up Sticky Thread Sticky: 2004 Duramax 6.6 Liter Diesel Engine Assembly Torque Specifications

    Started by RXTII, 12-27-2007 20:02
    • Replies: 5
    • Views: 54,207
    More Power
    06-03-2022, 09:59 Go to last post

  5. Sticky Thread Sticky: Dexcool vs. other coolants

    Started by TomJ01, 12-01-2010 16:01
    • Replies: 13
    • Views: 91,330
    More Power
    10-28-2020, 13:47 Go to last post

  6. 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: 64,366
    EdHale
    10-04-2020, 03:07 Go to last post

  7. Sticky Thread Sticky: Gasoline in my 6.6 Duramax

    Started by Javy, 06-01-2006 18:36
    2 Pages •
    1 2
    • Replies: 32
    • Views: 112,175
    DmaxMaverick
    05-21-2020, 11:15 Go to last post

  8. 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: 263,756
    wmholden
    10-29-2018, 12:13 Go to last post

  9. 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
    1 Attachment(s)
    • Replies: 223
    • Views: 538,122
    richp
    03-18-2018, 04:55 Go to last post

  10. Sticky Thread Sticky: 2001 LB7 fuel system/limp mode problem SOLVED

    Started by maverick2, 04-09-2010 12:46
    • Replies: 18
    • Views: 86,359
    Kennedy
    10-23-2017, 07:57 Go to last post

  11. Sticky Thread Sticky: DTC Codes-Definitions

    Started by MAV, 09-27-2003 06:24
    • Replies: 7
    • Views: 54,995
    DieselDavy
    09-07-2017, 16:45 Go to last post

  12. Arrow Sticky Thread Sticky: LML Fuel Economy

    Started by cowboywildbill, 04-29-2011 06:46
    • Replies: 18
    • Views: 63,363
    philstat
    07-13-2016, 07:27 Go to last post

  13. 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: 332,074
    chessy56
    01-19-2016, 14:50 Go to last post

  14. 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: 273,108
    prairiewind
    01-24-2013, 06:38 Go to last post

  15. Sticky Thread Sticky: New to Forum: How to tell type of Engine

    Started by bradjedis, 06-18-2007 10:41
    • Replies: 11
    • Views: 52,075
    Kennedy
    03-23-2010, 10:03 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: 19,682
    Mark Rinker
    08-03-2007, 07:58 Go to last post

  1. L5P: Balance rate criteria changed?

    Started by chessy56, 08-17-2023 06:45
    • Replies: 4
    • Views: 4,064
    More Power
    04-02-2025, 09:42 Go to last post

  2. Crank NO Start 2002 2500HD LB7

    Started by dgalvin66, 01-31-2025 16:03
    • Replies: 7
    • Views: 1,229
    jhornsby3
    03-24-2025, 13:02 Go to last post

  3. do injector cleaners work?

    Started by spongebob, 03-12-2025 08:48
    • Replies: 7
    • Views: 886
    DIESEL/VETTE
    03-20-2025, 18:29 Go to last post

  4. My cost to replace my 6.6

    Started by spongebob, 12-28-2023 13:33
    2 Pages •
    1 2
    • Replies: 22
    • Views: 10,790
    spongebob
    03-05-2025, 13:31 Go to last post

  5. Allison trans issue

    Started by Cold water, 01-22-2025 14:25
    • Replies: 4
    • Views: 979
    Cold water
    01-30-2025, 13:50 Go to last post

  6. Overheating ???

    Started by BOB-AUSTRALIA, 01-03-2025 22:49
    2 Pages •
    1 2
    • Replies: 21
    • Views: 6,420
    DmaxMaverick
    01-23-2025, 13:28 Go to last post

  7. 01 6.6 no fuel to filter

    Started by BruceFritts, 12-21-2024 14:27
    • Replies: 3
    • Views: 876
    DmaxMaverick
    12-23-2024, 12:41 Go to last post

  8. 2004 lly oil draining out exhaust

    Started by myztrain, 12-11-2016 08:55
    • Replies: 11
    • Views: 11,218
    Yukon6.2
    11-30-2024, 09:26 Go to last post

  9. transmission cable to transmission fitting

    Started by spongebob, 10-29-2024 16:03
    • Replies: 7
    • Views: 2,351
    DmaxMaverick
    11-04-2024, 17:29 Go to last post

  10. 2012 duramax Chevy Silverado fuel leak!!

    Started by Roofer911, 11-04-2024 05:29
    • Replies: 1
    • Views: 1,028
    DmaxMaverick
    11-04-2024, 07:52 Go to last post

  11. Exhaust output irradic?

    Started by Napco4WD, 10-24-2024 15:55
    • Replies: 2
    • Views: 2,783
    Napco4WD
    10-25-2024, 15:37 Go to last post

  12. 2001 LB7 P0102 code

    Started by Napco4WD, 10-15-2024 19:04
    • Replies: 9
    • Views: 9,636
    Napco4WD
    10-22-2024, 17:14 Go to last post

  13. draining cooling system how to:

    Started by spongebob, 10-07-2024 08:44
    • Replies: 8
    • Views: 10,048
    spongebob
    10-15-2024, 12:28 Go to last post

  14. Fuel Filter Head Assembly Discontinued - Options

    Started by Old Kodiak, 09-02-2024 20:34
    1 Attachment(s)
    • Replies: 1
    • Views: 4,516
    DmaxMaverick
    09-02-2024, 21:40 Go to last post

  15. turbo experts.....

    Started by spongebob, 06-13-2024 10:30
    • Replies: 4
    • Views: 11,287
    spongebob
    08-22-2024, 09:25 Go to last post

  16. Now I have a P2563 code...

    Started by spongebob, 07-25-2024 09:29
    • Replies: 16
    • Views: 10,478
    spongebob
    07-29-2024, 10:10 Go to last post

  17. Post Can We Legally Delete And Tune Diesel Engines Now?

    Started by More Power, 07-12-2024 14:59
    chevron deference
    • Replies: 3
    • Views: 16,935
    More Power
    07-14-2024, 14:29 Go to last post

  18. P003A code

    Started by spongebob, 06-12-2024 13:27
    • Replies: 9
    • Views: 11,350
    Yukon6.2
    06-22-2024, 09:49 Go to last post

  19. battery boils over, on one side?

    Started by delspeed, 12-03-2007 19:50
    • Replies: 14
    • Views: 14,739
    Wolverine68
    06-09-2024, 16:16 Go to last post

  20. Arrow 750K Mile Duramax

    Started by More Power, 03-22-2010 10:37
    • Replies: 13
    • Views: 178,133
    More Power
    05-23-2024, 12:27 Go to last post
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