I have this truck and it loads up while ideling are there anything that i can check to maybe find the problem and fix this issue?

 

Bad injectors just kidding
Seems like you work on a few trucks, do you have a service like alldata?
They have diagnosis flow charts that really help you along.
Need alot of data for a duramax diagnosis.

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loading up like it's trying to go forward? or loading with soot? elaborate please