What is this called? Leaking water temperature control for choke? Part # /gasket ?

 

no choke on these vehicles. but thats just your throttle body. they have coolant running through them to keep them warm. supposedly its mainly for colder weather and im guessing if you have a block heater. most gm vehicles have them and some people will bypass them just because of leaking issues. is that possible on your vehicle? idk

part number might be 91176135, its not a cheap part because all the sensors. if you can find it.

 

Thanks Irish!
I did manage to come up with the same part # after searching lots of pages.
I was thinking the unit slid out and there may be an O-ring that needs to been replaced. Took off the flange and decided
to leave well enough alone, rather than cause more headaches!!
Thanks again!