Problem With Oil Pressure Gauge
 

Yesterday I noticed that my Oil Pressure Gauge is not staying in the normal range. The pressure goes from around 40 to 80 and passed as the pictures show below. I was trying to find the Oil Pressure Switch Connector to see if possibly the connector fell out or is dirty or something happened to it in general. Can't seem to locate the darn thing. Any one know where it is located on a 2002 Chevy Blazer? If anyone could help that would be awesome so I may not have to take it into the shop. Hope to here from people about what to do!

It's on the back of the engine kinda under the distributor.

senders bad,its grounding out,or the ground is loose. have someone watch the gauge,while u wiggle the connector. if no change,replace the sender