97 tahoe/wheres rear view mirror temp sensor

[k30]

Hi all found a nice rear view mirror w/compass and temp gauge at a local pic/pull.I was wondering if someone could tell me where and what the temp sensor looks like out by the grill somewhere ??
Thanks

 

[dhcomp]

I actually want to know too.

 

[Jason4x4]

I think it's behind the grille.