air control valve
https://ls1tech.com/forums/showthread.php?t=139142
Lots of other good reading there too
yeah the one on the drivers side. i tried to pull it off and couldn't. i will try again today. does that air control valve make ticking noises. i hear what sounds like an exhaust leak and i checked all the header bolts and clamps, no air coming out. so i don't know where that ticking is coming from.
. the ticking is still there so it wasn't that. the search continues....... 

