Overheating and leaking coolant

[Dualnames]

Hey guys,

Have an issue with a 2005 Grand Prix leaking coolant and overheating. We were able to track down where it is leaking from but it is hard to tell what the part is called. The picture of it is below with wires coming out of it with an orange rubbery cover:

http://coriewhite.me/leaking.jpg

Would this sensor cause it to overheat if it failed? Any input on what part this is?

 

[TimMcCallum]

Dont exactly know much about all that but I know that sensor doesnt have to do with coolant temp. The coolant temp sensor is up top

 

[BillBoost37]

That is a knock sensor. Torque should be 14 ft lbs