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Message: <blockquote data-quote="99Sierra2500" data-source="post: 27393" data-attributes="member: 12343"><p>My funny maintenance story, other day my truck threw a code, a 404, lit the mil, kind of figured it might be the egr cause the idle was off, I drove home and put it on the scanner, got the code. Popped the hood and inspected the wiring, kind of old, but not much I can do about that. Next time driving, I took it out, drove it good, light went out. Good old truck. The valve was 71% open when I checked it, and it said the value should be 48-51%, maybe it had some soot in it.</p></blockquote><p></p>