NOTE: A new GMT800 LLY calibration will be available 9/4/2004 to correct the following 3 issues:
1) Rough idle, white / black smoke, and high balance rates
2) 1700 – 1800 light throttle combustion noise
3) Parking lot surge under 10 MPH with engine RPM 800 – 1000 RPM.
See PI# PIP3101. Replacement of injectors for these issues should not be done until the vehicle is updated with this calibration. If a concern still exists after calibration, replace only those injectors that are identified through diagnostics as failed.


Saw this on the page but seems to be some conflick as to if it is for the LLY or LB7.





Greg







Edited by: LanduytG

I haven't had any of the problems YET w/ my LLY.

I have one time and I have 10,500 on it. It was last weekend on the way to Kennedy's. But it has not done it since.





Greg

I will check it out tomarrow morning, I have a truck to do it on

It is available on TIS. I have done it already. It is for the LLY, definetely.

Just had this done, truck runs a lot better. Well worth it.

i think thats what they did to mine but its still smoking....white smoke only...

How do you go about getting this done?

Ditto what emerick 115 asked, AND should all the LLY owners have this done to avoid any of the problems in the future? JJ http://www.dieselplace.com/forum/smileys/Big Smile.gif

I am surprised that they didn't adress fuel mileage at the same time. Perhaps it's not an across the board problem.


If anyone has this reflash done please let us know if it helps fuel mileage or not.

Would an '05 LLY being built this week need this reflash right off the line??

I talked to my service manager and he said that he is supposed to receive the information on Sept. 15th and then they can update their scan tools to recalibrate the ECM. I am having my truck done next Monday because I get the surging at low RPM every day so I want to see if this fixes that as they say it does.

the info is out... dunno what he is waiting forhttp://www.dieselplace.com/forum/smileys/Confused.gif

The SM claims he won't have it for two days so I am not sure either...all I know is I am on the schedule for Monday and hopefully Monday night I won't have the surging or lunging I currently get at low idle..http://www.dieselplace.com/forum/smileys/Clap.gif

Can anybody post a copy of the actual GM info on this?


If it's been out as long as it appears, I'm going to have a talk with the SM at my stealer. My truck was in last Thursday for the AC TSB and I asked for them to check and see if it was subject to any campaigns or if any software updates had been released for my VIN.


They said no...http://www.dieselplace.com/forum/smileys/Angry.gif


I've noticed the parking lot surge, but thought it might be the Edge. I even asked Edge about it.

<H1>04 6.6 LLY Smoke , Fuel Knock , Surging and High Injector Balance Rates - kw white black idle surge rough noise accelerate P0300 P0301 P0302 P0303 P0304 P0305 P0306 P0307 P0308 miss misfire SES DTC #PIP3129 - (Sep 10, 2004)</H1>04 6.6 LLY Smoke, Fuel Knock, Surging, and High Injector Balance Rates


.


The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.<A name=ss1-1549221><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1549221&amp;psdid=437&amp;evc=sm#ss1-1549221" target="_blank">
<H5>Condition/Concern:</A></H5>


Customer concern may be a low speed surge (8 to 10 mph or near 1000 RPM), acceleration fuel knock noise at 1500 to 1800 RPM, rough idle, white smoke at idle, or high positive injector balance rates.<A name=ss2-1549221><A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1549221&amp;psdid=437&amp;evc=sm#ss2-1549221" target="_blank">
<H5>Recommendation/Instructions:</A></H5>

<LI =1>High positive injector balance rates (over +4.0 in park or +6.0 in drive) may be causing white smoke at idle or while driving.
<LI =1>Document all injector cylinder balance rates at the beginning of the diagnosis.
<LI =1>There is an updated calibration to address the white smoke, high positive balance rates, idle surge, and a fuel knock noise at or near 1500 to 1800 RPM.
<LI =1>Install the updated calibration and evaluate the smoking, high injector balance rates, idle surge, and fuel knock noises.
<LI =1>If there is still a mechanical concern with an injector, and balance rates are still over the SI specification of +4.0 in park or +6.0 in drive, replace only the effected injector. </LI>


NOTE: Before any injector replacements a large fuel sample should be taken from the fuel filter and checked for contaminants or poor quality.

Thanks Eric...http://www.dieselplace.com/forum/smileys/Clap.gif

NOTE: Before any injector replacements a large fuel sample should be taken from the fuel filter and checked for contaminants or poor quality.









This is BS. Like anyone of us have anything to do with pump fuel quality. How many of us brew our own diesel?How many of us designed the Duramax fuel filter to allow passage of containments?Where are they taking it from the dirty side?


How stringent is this policy adhered to and what exactly are they looking for?


I tell you if I were refused a warranty claim on faulty FILLING STATION PUMP FUEL I'd be done with GM.


That statement makes me sick!What a F'in cop out!!!


Mac Edited by: Mackin

Ya Mac, it looks like GM is going to push this thing George got wrapped up in.


I saw that cute little note at the end, but I'm not worried about it. My truck only has 2700 miles on it, ALL of my fuel has come from one high volume local truck stop, and it has the official Racor pre-OEM filter installed.


Along with that, I got the stealer's SM to okay the Racor with the product bulletin before it was installed. It'll be interesting to see if I run into crap over fuel...http://www.dieselplace.com/forum/smileys/Ermm.gif

OH MY GOD! Mac you finaly said it!Done with GM,I smell a cummins in your future. http://www.dieselplace.com/forum/smileys/HiHi.gif


We have not done the reflash.But we also have none of the symtoms. I'm thinkin' about the Fingers-Block-Off-Plate for better milage.http://www.dieselplace.com/forum/smileys/Confused.gif

It's GM's ,Bosch fuel injection system. They designed the system around the fuel quality in the US not me. Cummins has had great luck in Europe as the have stringent fuel quality.


If GM wants to blame where I buy my fuel commercially then they should have a list of acceptable filling stations in the back of the owners manual,otherwise pi$$-off.





Mac

Will this reflash effect the performance of the Juice??

Also, I dont really have any of the symptoms, the only thing I notice is that the truck will smoke more that it should after idleing for a longer than 5 minutes. Should I have the reflash done anyways?

Don't hold back Mac http://www.dieselplace.com/forum/smileys/Angry.gif


Let it all out http://www.dieselplace.com/forum/smileys/Big Smile.gif

These guys are starting to sound like Ford, the bean counters win everytime. Well I guess the bean counters win except when we go buy our next truck. If this persists, I'll be gone even though I haven't had any real problems so far. Corporate America at it's best.

Maybe - just maybe - GM doesn't want to cough up the $$$ to replace injectors if its just a bad load of fuel? It doesn't say they'll void warranty.


Perhaps they'll recommend a refuel to see if problem persists? Bad fuel does happen, and we can't control it. Seems GM would like us to...


I know, I know. I'm being WAY too optimistic about GM's warranty practices. Although, I've never had an issue. (Knock on wood...)


At least we can grease the front ends of our trucks. Stupid Dodge - 2 zerks ?!? http://www.dieselplace.com/forum/smileys/Confused.gif


Ty

Every major brand has its problems, what ever it may be. You can drive a butt ugly Dodge or a Ford that stears like a heard of goats. But I will take my GM anyday.http://www.dieselplace.com/forum/smileys/HiHi.gif





Greg

That is a "blanket" statement and wide open for interpretation in my eyes.


I had my dealer tell me that my U joints click because of the extra shift modules in my tranny I installed ,I ignored him,so just imagine that info in the wrong hands.


Perhaps we can get some clarification.


Is GM saying that the Fuel filter is in adequate for trapping debris and water?


Is GM saying the "some" fuel quality isn't adequate for the Bosch Injectors? See above.


Is GM just saying that the load of bad fuel that passed thru their inadequate filter caused the damage or that the truck is just running poor do to bad fuel?


All I know is I have injectors "knocking" on occasion running thru a 2 UM Cat filter for nearly 20K that are progressively getting worse. You tell me,bad filter,bad fuel?


They need to suck it up!





Mac

Seems to me they did suck it up with the 01-02 LB7. I am sure it will continue with the 03 and later. May be Bosch is the problem? Seems to me that Cummins is having few problems as well here in the US. Don't know what to make of all it but i know that I am not going to jump ship over it and go to something thats not any better in other ways.


Look at Ford/Navistar injector problem in the 6L. Ford blames it on Navistar. Should it have been Fords problem because of their fualty fuel filter?


All I am saying is EVER new diesel with common rail injection is having some sort of problem. What needs to happen is the US fuel make needs to suck it up and make better fuel.





Greg


Greg

Yeah, you're right. I guess it depends on the monkey that interprets it...


Some dealers are cool, others not. I guess you have to hope you don't get a corporate puppet - "Well it says right here...VOID VOID VOID..."


What IS GM saying? If we can get an answer to that...http://www.dieselplace.com/forum/smileys/HiHi.gif


Ty


on edit - Corporate Diapers - They are all covering their OWN a$$


Edited by: tysmith

So can anybody answer wether we should get this done or not if we arent really experiencing any of the problems? I'm curious if the recalibration would help mileage.

if it isnt broke, dont fix it. The recal is not stated to help mileage at all. And most dealers wont do the update unless the said problem is occuring..

thank you

Had it done on mine. Cleared up the rough idle problem.