Question about GMC Suburban
Best bet is to replace it for the long run. if code still comes on we have had a few chevy cars that needed a pcm updated this can only be done by the dealer most of the time it cost only one hour of labor. and it fixed it plus a few other things also good luck.
Posted on Jul 11, 2012
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Posted on Jan 02, 2017
SOURCE: diagnostic code 1404
Trouble code P1404 means: EGR Close Position Performance
basically pull off the EGR and try to clean it up, if that doesn't work it will need to be replaced.
Hope that helps!
Posted on Mar 17, 2010
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