Question about 2003 Chevrolet Silverado 1500
Spark plugs always have a story to tell. pull one of the center spark plugs on either bank and see if it is all black. If so you want to have your EGR valve checked and the catylitic converter. Most likley one of these two is at fault.
Posted on Sep 07, 2009
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Posted on Jan 02, 2017
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