http://www.camaro5.com/forums/showthread.php?t=361269
http://www.camaro5.com/forums/showthread.php?t=362029
http://www.camaro5.com/forums/showthread.php?t=355197 (post #20 has link to pdf of the bulletin from GM)
https://autos.yahoo.com/news/gm-iden...140005491.html
It's not a recall, just a service bulletin to repair cars showing signs of the problem. From the way I read it, the extended warranty is for the original supercharger not a new one as a new one won't have this specific problem.