Check engine light on! - Page 2 - Chevy and GMC Duramax Diesel Forum
2011+ LML 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 Ect

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Old 12-26-2012, 11:21 AM   eBay Motors  #11 (permalink)
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Old 12-26-2012, 11:23 AM   eBay Motors  #12 (permalink)
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I had codes cleared at Auto Zone up till about 2 years ago. They said there was a law suit where they were accused of clearing something that resulted in a dangerous condition and they weren't allowed to clear them any more. If it ain't the guvmint it's the dang amblins chasers.
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Old 12-26-2012, 03:19 PM   eBay Motors  #13 (permalink)
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Did you make sure it's got def in it?
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Old 12-26-2012, 05:12 PM   eBay Motors  #14 (permalink)
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Yes def was filled 800km ago it took 600km to acknowledge the fill. I think it has something to do with the urea. ? Maybe? I did not renew my onstar I think that is all a bunch if crapp. Long story why but in short it is undependable here for what I needed.
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Old 12-26-2012, 06:22 PM   eBay Motors  #15 (permalink)
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Could be the def frozen? I think you get 30 mins or something for the truck to thaw the def tank before it throws a code but with the temps we've had the last week or so I don't think that's long enough, can you warm it up in a shop/garage overnight?
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Old 12-26-2012, 06:44 PM   eBay Motors  #16 (permalink)
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Maybe? It's been outside. Does the def tank have a 115 volt heater in it? Like the block heater but in the def tank? I know there is a 12 volt heater in the tank maybe it isn't enough when temps approach the -30c mark?

I'll know tomorrow it's going into the dealer.
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Old 12-26-2012, 06:53 PM   eBay Motors  #17 (permalink)
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Just the 12 volt heater I think and at 30 below I think it's too cold to properly thaw before it throws a code. I guess you could add an auxiliary 115volt pan heater if it becomes a problem. You'd hafta install it between the tank and the outter tank cover insulation piece.
Let us know what the dealer says
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Old 12-27-2012, 08:37 AM   eBay Motors  #18 (permalink)
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@liberty, WOW, you’re area is getting that cold already? I don’t mean to sound ignorant, but shocked… that’s really cold, bbbbrrrrrr!

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Old 12-27-2012, 08:54 AM   eBay Motors  #19 (permalink)
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@Clubin, I hope things will go well today. If you need further assistance with this please, don’t hesitate to contact General Motors of Canada at 1-800-293-3777. Their hours of operation are Monday through Friday, 7:30am to 11:30pm EST and Saturday, 7:30am to 6pm EST.

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Last edited by GMCustomerService; 12-27-2012 at 08:55 AM. Reason: Type-o
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Old 12-27-2012, 03:01 PM   eBay Motors  #20 (permalink)
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Well dealer has the truck they'll have it all night and hopefully it'll be fixed tomorrow. I was told the urea tank was frozen solid it needs to defrost They tried to download a new program for the 12v elements to maintain. But couldn't for some reason. They suspected because the tank was frozen. So maybe I'll know more tomorrow.
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