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Thread: EGR on Ca 2003 LB7?

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  1. #1
    Join Date
    Dec 2001
    Location
    Yorba Linda, California
    Posts
    496

    Default

    Also, keep in mind that the 2002-2004 LB7 EGR that was used in the CA trucks is different than the EGR used in the LLY version. The LB7 EGR is vacuum operated and has a vacuum pump on the passenger side of the engine. The LLY version is not vacuum operated and there is no vacuum pump.
    '02 Chev 2500HD EC/SB 4x4 D/A

  2. #2
    Join Date
    Mar 2007
    Location
    Pacific Northwest
    Posts
    740

    Default

    What did you come with SIGGY?
    1998 Chevy k-2500 454 147,000 miles and climbing!

    1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!

  3. #3
    Join Date
    Oct 2005
    Posts
    27

    Default

    Thanks for the diagnostic chart! I had cleared the codes after reading them and they have not come up again, been almost 1K miles and all is good. I'm wondering if it was a fluke one-time event, or a preview of upcoming issues. This truck has been very solid and reliable so far, my fingers are crossed that things will remain so. 137,000+ happy miles, I keep telling myself I don't need to upgrade to a new truck. Over and over...
    2003 Chev 2500HD/LT/CC/LB7-Duramax/Allison/H2wheels/Bilsteins/Green Keys/195K

  4. #4
    Join Date
    Mar 2007
    Location
    Pacific Northwest
    Posts
    740

    Smile

    I'm glad you like your truck!!
    1998 Chevy k-2500 454 147,000 miles and climbing!

    1993 Pontiac G/A Big Block 3.3 Liter 140,000 miles and still going too!

  5. #5
    Join Date
    Oct 2001
    Location
    Myrtlehead, TX
    Posts
    414

    Default

    Siggy,

    My EGR was replaced five monthe ago and the code came again last week. A mech in Oregon took it out and a water cooled pipe that conects to it and cleaned the pipe. It was vety cloged. Hope this helps.

    Mike
    2002 GMC, Pretty Dark Blue, 4x4 / 3500, ZF6, 115 gal spare tank and Rockets... (My Other One): Flying Fuel. I got three engines and a 52,000 gallon tank, how many you got?

  6. #6
    Join Date
    Dec 2001
    Posts
    44

    Default Egr

    humm egr block off plate .I have an 05 any info would be greatly appriceated. My e mail is olychuckchuck@hotmail.com

  7. #7

    Default

    I happen to have an 03 LB7 and have had the darn P0404 code for several months now. I've replaced:
    1997254
    and
    94459951

    If anyone has anymore words of wisdom, I'd really appreciate it. Could I see that diagnostic chart?

    is the EGR supposed to move? This weekend I was looking at it and couldn't budge it...


    anyone?

  8. #8
    Join Date
    Aug 2020
    Location
    Phoenix AZ
    Posts
    2

    Default

    Siggy, hey man do You think You could share the chart with me also?

    Vincechacon38@gmail.com

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