ok still dealing with truck smoking at idle. Took to dealer today help PLEASE - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 41 (permalink) Old 10-22-2010, 04:19 PM Thread Starter
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ok still dealing with truck smoking at idle. Took to dealer today help PLEASE

I have an 04 gmc 2500hd with the lb7 with 165k on it. I have owned the truck for about a year and don't know if the injectors have ever been done or not. I smokes white smoke at idle and it a fair amout of smoke ( gets a little embarassing at stop signs). the special warranty runs out on oct 29 so i took it to the dealer again to try to get them done and once again i got the run around and told they don't really know whats wrong and just want to try a few things like a fuel filter (for $140) which only has about 3or4k miles on it. and they wanted to try to update the ecm. I told them i would come pick it up but i wanted the balance numbers so here is what i got

In park
-1.9,4.2,3.3,-1.5,.1,.4,-3.1,-1.2 and they told me the specs are -6 to 6
in drive
-2.6,2.5,2.2,-.3,1.0,1.1,-3.7,.1 and the specs are -4 to 4

Does this mean anything to anyone who know anything haha. and what would you suggest. thanks again
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post #2 of 41 (permalink) Old 10-22-2010, 04:21 PM
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Hmmm. get back to you after a phone cal....sure some one will chime in
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post #3 of 41 (permalink) Old 10-22-2010, 05:36 PM
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in park +/- 4 in drive +/-6 are you getting diesel in oil

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post #4 of 41 (permalink) Old 10-22-2010, 05:59 PM Thread Starter
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dosent look like it by just checking the oil. i ask the dealer to check it out and ofcourse they didn't and after telling me 50 dollars in diag. they tried to charge me 90 wtf. is there a better way to check for diesel in the oil?
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post #5 of 41 (permalink) Old 10-22-2010, 06:24 PM Thread Starter
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are you sure its in park +or- 4 bc that would mean i have one out of spec right?
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post #6 of 41 (permalink) Old 10-22-2010, 06:30 PM
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post #7 of 41 (permalink) Old 10-22-2010, 06:31 PM Thread Starter
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post #8 of 41 (permalink) Old 10-22-2010, 06:32 PM
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dump some fuel in crankcase and take to a different dealer.

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post #9 of 41 (permalink) Old 10-22-2010, 06:36 PM
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for starters has the dealer checked history on your truck to see if the injectors have been replaced. If they have been they would see this because it would have been done under warranty. If not have them check, otherwise i can do it for you. btw it is free to look. all they would need is vin#. I have an 04 with a lb7 in it and it was doing the same thing at idle. put injectors in it problem solved.
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post #10 of 41 (permalink) Old 10-22-2010, 06:40 PM Thread Starter
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no one said anything about them being done before so i don't think so but i'm not sure. they woun't be open til monday to check or i can give you my vin let me know if you want it.
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