oil pressure sensor

Where is the oil pressure densor on a 99 Grand Cherokee located? Does anyone have any pictures so I can reference this? Are there any books (Chiltons, i.e.) that might be usefull?

Thanks in advance for any help!!!

4.0 or 4.7?on a 4.0,it is on the passenger side of the block by the oil filter.On a 4.7,it's on the driver side front of the engine right above the oil filter.

Thanks for the info...it helps tons!!

What does it look like? What I thought was the pressure sensor was the camshaft position sensor..