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Chevy Suburban DTC P0404

Q. I have a 1999 Chevy Suburban. Engine code read out is P0404 EGR. Can I correct this without taking truck to dealer? If so, how? Thanks for any help. Does this have to be fixed? Dealer that read code wanted $500.00 to fix problem. Seemed high.

Chevy Suburban DTC P0404

A. If they diagnosed it and came up with a bad EGR valve, chances are the price included the new EGR valve. They are quite expensive. I don't think any aftermarket companies make them. You can put a new EGR valve on it yourself. Just make sure you get a new gasket with the valve.

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