Well tonight I discovered a miss and was messing with the plug wires to get them away from the headers. I was trying to correct a plug wire connetion between the spark plug and the wire itself. I tried getting leverage on this one thing and snapped it.

Description - I was trying to correct the plug second from the front on the driver's side. It's a black/blue colored thing that goes into the block behind the header and it goes into this cream colored thing in the block. Around the cream colored thing is a big nut that it looks like you can twist off.

What is this thing? I didn't drive it after I snapped it off, is it important?

If at all possible could I get a part number because I'm probably going to end going to the stealership tomorrow to get it...

 

Sounds like the coolant temperature sensor for the gauge on the dashboard. Were any wires connected to it?

 

Well it was dark out but yes, one, it looked bluish or greenish.

 

http://shbox.com/1/temp_sensor2.jpg

 

Yep, thats it! Thanks! You don't have a part number by chance do ya?

 

PT728 ECT sensor in head for gauge 12126458

http://shbox.com/1/Parts.htm

Shbox says it's for your gauge. So long as there isn't coolant leaking the car should drive fine with this broken.

 

GM PART # 25037332 is for the sensor. The other number above is for the wiring pigtail.