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Duramax..lost power..the road and noticed the check engine light came…

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I have an 03 duramax...
I have an 03 duramax and shortly after I added some Shell diesel fuel I lost power. I pulled to the side of the road and noticed the check engine light came on. My owners manual indicated that it might have been some bad fuel along with filter problems. I continued to drive a long distance and again lost power going up a fairly steep hill but all seemed well after i got to the top. any ideas what is going on??
Submitted: 8 years ago.Category: GM
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Answered in 6 hours by:
6/14/2010
GM Mechanic: GMC Expert, ASE Certified Technician replied 8 years ago
GMC Expert
GMC Expert, ASE Certified Technician
Category: GM
Satisfied Customers: 10,370
Experience: 30 yrs experience, ase certified, shop owner
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Most likely this is going to have something to do with your fuel system.Obviously the first place we want to start since you just fill the truck up is to take a fuel sample and be sure there's nothing wrong with the fuel also replace your fuel filter

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