It can be found just behind the oil filter on the underside of the engine. Its has a single Alan key bolt attaching it to the front of the engine. :-)
There is only one crank sensor fitted, you may also have a cam sensor. the crank sensor is located either around the bellhousing or around the front crank pulley. It either has 2 or 3 wires. It picks the signal off the revolving crank so look for a sensor in the block near flywheel.
Crank sensor goes through the top driver side of the bell housing. Cam sensor is inside the distributor.Crank sensor goes through the top driver side of the bell housing. Cam sensor is inside the distributor.
Probably a crank sensor
To determine if the crank sensor is faulty on a Chevy Lumina Z34, you can perform a diagnostic test using an OBD-II scanner to check for any trouble codes related to the crank sensor. Additionally, you can use a multimeter to measure the sensor's resistance and voltage output to see if it falls within the manufacturer's specifications. If the sensor is not providing accurate readings or if there are no signals detected, it is likely that the crank sensor is defective and needs to be replaced.
The crank sensor is located on the top of the bell housing on the drivers side.