Chevy/GMC Truck and Duramax Turbo Diesel Forum Discussion of General Topics related to All Chevy and GMC Trucks as well as the Diesels in them

Code 678

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Old 05-15-2016, 02:46 PM
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Question Code 678

I just changed all the glow plugs on the passengers side of the engine I still keep getting code 678 any ideas I clear the code it stays out for a while then comes back
 
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Old 07-21-2016, 09:43 PM
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p678 is on the drivers side. the last number is the location number odds on the passenger side and evens on the drivers side if you have a lml
 


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