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Jay, ASE Certified Technician
Category: Car
Satisfied Customers: 41
Experience:  Over 20 years experience in automotive diagnostics, repair and preventative maintenance.
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Submitted: 8 years ago.
Category: Car
Expert:  Jay replied 8 years ago.

Hey there!

The duramax diesels, like all diesel engines do not run well with dirty/clogged fuel filters as well as dirty/plugged air filters.

Check the air filter first, then the fuel filters. Also if your fuel filters are drawing air into the fuel system, this will also cause the engine to run rough.

I hope this helps you.
Cheers, Jay

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