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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

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  #1  
Old 09-17-2007, 07:24 PM
siggy siggy is offline
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Default EGR on Ca 2003 LB7?

Today, out of the blue, I had SES light and code P0404 thrown twice. It is EGR "Open condition" related, so I did some searching. I've found info about the EGR and related block off plate for 4.5 to LBZ LLY Duramax engines, but nothing on LB7 EGR. I can't even locate it to check the blue wire that has been mentioned in threads. If anyone is familar with the California spec LB7 EGR stuff to point me in the right direction or to a thread somewhere, I'd appeciate it.


thanks,
siggy
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  #2  
Old 09-17-2007, 08:24 PM
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Duramaster Duramaster is offline
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Send me your personal e-mail and I will send you the diagnostic chart for the P0404 for you 2003 CA LB7.
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Old 09-19-2007, 06:54 PM
OC_DMAX OC_DMAX is offline
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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.
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Old 09-20-2007, 10:44 AM
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Duramaster Duramaster is offline
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What did you come with SIGGY?
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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!
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Old 09-20-2007, 09:13 PM
siggy siggy is offline
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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...
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Old 09-21-2007, 06:32 AM
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I'm glad you like your truck!!
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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!
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  #7  
Old 09-23-2007, 12:58 PM
MaxACL MaxACL is offline
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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
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  #8  
Old 10-04-2007, 04:48 PM
Chuck1 Chuck1 is offline
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Default Egr

humm egr block off plate .I have an 05 any info would be greatly appriceated. My e mail is olychuckchuck@hotmail.com
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  #9  
Old 11-12-2007, 05:36 PM
iamrazor iamrazor is offline
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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?
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  #10  
Old 08-05-2011, 09:16 AM
mattb5150 mattb5150 is offline
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Have truck in dealer for noise after water pump replacement, belt off sounds goes away we think its the tensioner and are replacing that. Truck also had SES and tech says it has P0404 and P1404 wants to clean or replace the EGR valve. I am wondering if the EGR cooler needs cleaning, truck has 150k miles and usually runs light duty no heavy towing. Also wondering if EGR needs calibration.

Matt
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2003 GMC K2500HD SLT EXTRA CAB/SB DMAX/ALLI, Bilsteins, Sulastic Shackles, Pitman & Idler braces, KD Headlight Harness, CAT filtration, Lift pump w/KD harness, Denali Door handles, Yukon exterior mirrors

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