Pontiac 6000 Crankshaft Sensor Location

My 1990 Pontiac 6000 3.1l Will Start When Its Cold And Dies Out Once It Warms Up. I Want To Try And Replace The Crank Sensor, Only Problem...

I Have A 1991 Pontiac 6000 Le W/137000 Miles And A 2.5l Engine. I Am Trying To Locate The Sensor And Have Been Unsuccessful....can Anyone...