Quote:
Originally Posted by 98indypacer
I believe that nut for the ECM is the same as the nut used to attach the rear fascia to the body, so you can switch one from the back that will not be seen with one of the Fastenal nuts. 
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Good tip, will have to check that out.......

Well at least we have an alternative just in case these are no longer available from GM.....or just hard to find....