Guest 51c8Joe Posted September 28, 2013 Share Posted September 28, 2013 My Pontiac has a thin aluminum plate screwed to the firewall directly below the data plate. It is about 4 and 3/4 inches long and 3/4 inch tall. Has two sets of numbers "3874 3834" Any idea what it is and what does it mean? I was thinking it may have been a result of an engine change, but the serial number of my six isn't even close. Any ideas? Joe Link to comment Share on other sites More sharing options...
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