I know there are several posts about smoking LLY's. Mine has done this a few times but not white or black smoke. Always when idling the engine will run rough and blue smoke emits from the exhaust then goes away. This truck has never run as good as my 01 LB7. Needless to say, very disapointed in this truck. Any suggestions? I see a Cummins in my future.

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 RatesThe following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
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.

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)

Thanks


So I can take this information to a dealer and they will do the recommended work from the service bulletins?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

<o:p></o:p>


<o:p></o:p>

Thanks


So I can take this information to a dealer and they will do the recommended work from the service bulletins?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

<o:p></o:p>


<o:p></o:p>I would take it with you just in case they don't believe you but don't show it first. Tell them your buddy had a similar issue and said his dealer gave him a bulletin # then just give them the number if they want it. Some dealers don't like to know that you know more than them.

I love forums when you can go to the dealer with more knowledge than the people that work on them everyday.

The stuff I learn on here just blows my mind.

Mine had the same problem. Had a reflash last week and set the new programming. The problem is gone. Traveled to SoCal and back without a hitch.

Truck is at dealer now. One bad injector so far. Parts ordered.

I have the same issue with 04.5 D/A. Not dissapointed in any other way tho. I have been wanting to get the reflash but was wondering if anybody new of the best dealer to go to in the Northern VA/ D.C. area. that is where I am living now:banghead:.

This injector thing is getting old. We are on revision 2 of the engine and lord knows what revision on the injectors and nearing the 6th model year after release of the DMAX. GM was good about stepping up on the 01/02's but at some point you have to have to be able to come up with a solution. I don't design injectors but a can't believe that it is this difficult. :mad: :rant: