You could hold the new part in hand and look for it.it will be on the side of the engine block are the tranny bell housing.you might have to lay under the vehicle to fine it.between the motor and firewall.hope this helps you out a bit.
Where Do I Find The Crank Sensor In A 1996 Pontiac Bonneville 3.8 V6?
The crank sensor is located behind the harmonic balancer on the end of engine the belt is on . You must remove the harmonic balancer to change the sensor