gauge circuit board I.D. on 81-87

[blazer2007]

I have a bunch of 81-87 circuit boards that I want to convert my 1980 idiot light to a gauge setup. On the 81-87 circuit boards there are stamp numbers on the back like 2424,is there a chart to tell me what they are

[ray_mcavoy]

There is usually a GM part number (like 25044897 for example) etched into one of the wider areas of the foil traces on the printed circuits.

You can search for that number on the http://www.gmpartswiki.com website to bring up all the GM parts catalog listings that will show the various applications.