I tried vice grip and channel lock i got the room but it just too tight

 

Now that I've done mine, and have watched too-many YouTube videos, I see that some have cut away the plastic guard that obscures getting to this. If I ever need to do this again, that useless piece of plastic is getting cut away. See theseRemoving some of sound barrier for oil pressure sender access


This one mentions removing the plastic shield

 

That must’ve been a really early design or some random, off-brand replacement that a PO found - I’ve never seen one of these switches with that kind of shell.

It’s looking like your only choice will be to cut off the shell so you can get a socket on it.

The sensor these videos refer to is on the newer LS small block engines, located at the back of the valley cover.

The switch the OP is referring to is mounted in the timing cover near the crankshaft pulley - it provides power to the fuel pump once the engine is running.

 

Waiting for a friend comes back to town see if he has the socket. Store want $30 for that thing.i am just glad is not the fuel pump. Did that twice already. All are gm factory parts.
.

 

Vice gripe with the jack handle for leverage. Got a off.plug it back in so far so good.again thx for you guys help