I took my rig in to the dealer yesterday for the common smoke and rough idle issue w/ the #4 balance rate at +14. One of the techs said that there was a re-flash out to deal with this problem. I told him that I had last fall's but he said that there was a more current one not associated with any SB's.

Has anyone else heard of this or was the tech blowing a little smoke of his own?

Thanks.

whats your vin?

I also had a reflash in the fall. My VIN is 1GCJK39274E271716. Do I have the latest?

Thanks

I thought it would give the release date on the calibration menu, but it dosnt, I may still be able to find out. If I had to guess, I would say that you have the latest, since I see only 1 update, but not sure on the release date.

:help: i had to take mine in for running rough at 185 degrees they said the reflash would take care of it. my question is why all of a sudden after 8000 miles does it need it

Cobra#3747 -
My VIN is 1GTHK29214E268643. I have reflashed with last fall's reflash release. As far as I know there is only one for this truck - which I applied.

Thanks.

looking at the cal numbers, I think there is only the one released for the smoke and rough idle

just took mine in yesterday for the flash, told them white smoke at idle and rough idle while in gear, said they couldnt do anything for me as GM had this under investigation.

any thoughts on this?

Just got a call from the dealership.
they stated that there is a bullitin out dated Dec 17, 2004, # pip3256A

said that it supersedes the reflash issue dated around Sep 04 ?

Any techs out there want to chime in on this?
thanks

Do you have egr codes? I would look at the second PI I listed. They wont just try the reflash for you?



04 - 05 LLY 6.6L Diesel EGR DTCs P0401 P0404 Under Investgation - kw idle rough #PIP3256A - (Dec 17, 2004)

04-05 LLY 6.6L Diesel EGR DTCs P0401 P0404 Under Investigation. .

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in the PI.

<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1578718&evc=numSrch#ss1-1578718">Condition/Concern:

Vehicle may be brought in for SES or MIL light on. Upon inspection of the vehicle, the technician may find EGR DTCs P0401 or P0404.

<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1578718&evc=numSrch#ss2-1578718">Recommendation/Instructions:
<LI type=1>Complete the proper SI diagnostics for the DTCs found. <LI type=1>If normal SI diagnostics have been completed and were inconclusive, inspect for any exhaust, air intake, or wiring harness modifications made to the vehicle. Modifications may induce EGR codes. <LI type=1>Monitor the five volt reference to the EGR valve. A chafe to ground on a five volt reference circuit may pull the reference voltage low and induce EGR codes. Inspect and wiggle test the complete engine wiring harness. Inspect all terminal pin tensions at connector C108. <LI type=1>Please document as much of the following information from the freeze frame data and the customer description as possible: <TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Engine run time: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Engine temperature: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>MAF sensor G/S: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>MAF sensor Volts: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>EGR position sensor volts: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>EGR position sensor position %: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>EGR solenoid command: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Desired turbo vane position %: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Turbo vane position sensor %: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Coolant Temperature: </TD></TR></TBODY></TABLE>
<TABLE border=0><TBODY><TR><TD vAlign=top>- </TD><TD vAlign=top>Vehicle speed: </TD></TR></TBODY></TABLE>
These readings will be used for diagnostics and an engineering investigation. This PI will be updated with any new information when it becomes available.
.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1578718&evc=numSrch#ss3-1578718">Models:

(04 05 LLY 6.6 C2 C3 K2 K3 Chevrolet Silverado Kodiak GMC Topkick, Sierra)

.





<TABLE width="100%"><TBODY><TR><TD align=left width=778>GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.








</TD><TD align=middle width=42>http://service.gm.com/engif/000/999/999/999999994.gif </TD><TD align=middle width=167>WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


</TD></TR></TBODY></TABLE>© Copyright General Motors Corporation. All Rights Reserved.





04 05 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 #PIP3129B - (Oct 21, 2004)

04 05 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 href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1557897#ss1-1557897">Condition/Concern:

Customer concern may be a low speed surge (8 to 10 mph or near 1000 RPM), acceleration fuel knock noise at 1700 to 1800 RPM, rough idle, white smoke at idle, or high positive injector balance rates.

<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=1557897#ss2-1557897">Recommendation/Instructions:
<LI type=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 type=1>Document all injector cylinder balance rates at the beginning of the diagnosis. <LI type=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 1700 to 1800 RPM. <LI type=1>Install the updated calibration and evaluate the smoking, high injector balance rates, idle surge, and fuel knock noises.
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.
NOTE: Before any injector replacements, a large fuel sample should be taken from the fuel filter and checked for contaminants or poor quality.

.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

Models:

(04 05 LLY 6.6 C2 C3 K2 K3 Chevrolet Silverado 2500HD,3500) and (04 05 LLY 6.6 C2 C3 K2 K3 GMC Sierra 2500 HD,3500 ) and (04 05 LLY 6.6 C4 C5 D4 D5 E4 E5 Chevrolet Kodiak 04 05 LLY 6.6 C4 C5 D4 D5 E4 E5 GMC Topkick)

.



<TABLE width="100%"><TBODY><TR><TD align=left width=778>GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.


</TD><TD align=middle width=42>http://service.gm.com/engif/000/999/999/999999994.gif </TD><TD align=middle width=167>WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


</TD></TR></TBODY></TABLE>

© Copyright General Motors Corporation. All Rights Reserved.


(http://service.gm.com/servlets/BlobShtml?ShtmlFile=1557897#ss3-1557897)

they said they couldn't do anything while there was an investigation by GM going on.

I did not get any lights on the dash but no telling what kind of codes are in there that didn't come up on the dash.

by the way, i have not hooked up the Predator to the truck yet and i have taken the egr plate off for the trip to the dealer.

Thats stupid, find someone else to do it. You dont have any light or EGR codes that is all that PI is for, does not say they cant reflash it.

thanks, thats what i thought. is there a good dealer up in Baltimore? I am down in Arlington.

I am up in Timonium, about 20-30 min north of Baltimore. Not real sure on how anyone else is in the area. Findind guys that dont mind working on Diesels is the real problem, they will do what ever they can to get away from them. Like here, its me and one other guy that will even touch them for the most part, everyone else runs and hides.

i just talked to another service writer, asked him about the PIP they gave me, he talked a bunch of cr**. then i asked him if the tech had written anything about checking the injector balance and he himhawed around the subject.
think i need to go down there after the tech gets back from lunch.

by the way, this is supposed to be the only dealer around here that has a diecel tech, 17 miles west of D.C. (Dudley Martin I believe).

Crap keeps up here, they will be one more short in the area...lol

Doing a reflash is not going to hurt anything and just maybe for a new idea, it might actually fix something, not that we would want anything like that to happen.:rolleyes:

:) thanks for the help.

just for sh**s and giggles, does it cost anything but time to do the reflash?

All you use is the Tech II and a computer to download. Cost of the tech to do it, but they also get paid by GM to do it.