Where is the crankshaft position sensor located on a 1995 Firebird with a 3.4 motor?

Question edited for clarity.

I don't know. It is definitely there. Check out the vidoes and click the images tab, second image.

https://www.google.com/search?q=1995+gmc+sierra+5.7+crankshaft+position+sensor+location

..

Here's a link to your crankshaft sensor. Repair Guides Electronic Engine Emission Controls Crankshaft Position ckp...

Picture is on the internet-- Google it

You Tube Video

I don't see a parts listing for a Crankshaft position sensor...are you sure that's what you are looking for? They are usually located in one of two places on any car, either behind the harmonic balancer or in the middle of the block above the oil pan, usually on the backside of the motor.

The Crankshaft Position (CP) sensor, located inside the front cover is used to determine crankshaft position and crankshaft rpm.


REMOVAL & INSTALLATION

1. Disconnect the negative battery cable.
   
2. Loosen the water pump pulley bolts, then remove the accessory drive belt is necessary.
   
3. Disconnect the wiring to the crankshaft position sensor. Remove the sensor mounting bolt, then remove the sensor.

To install:

1. Install the sensor and connect the wiring. Tighten the mounting bolt to 71-106 inch lbs. (8-12 Nm).
   
2. Install the accessory drive belt if removed. Tighten the water pump pulley bolts as described in routine maintenance.
   
3. Connect the negative battery cable.

Hope helps (remember to rating this free answer).

It's officially called a CMP Syncronizer.
There are stern warnings on the page associated with this.
CAMSHAFT POSITION (CMP) SENSOR Removal & Installation
CMP sensor is located on rear of engine, behind intake manifold. Before removing, note position of electrical connector on CMP sensor. Remove upper intake manifold. See UPPER INTAKE MANIFOLD . Disconnect CMP sensor. Remove CMP sensor screws and CMP sensor. To install, reverse removal procedure. Ensure CMP sensor electrical connector is pointing in original direction. Tighten CMP sensor to specification.
2 . Failure to use synchro positioner during installation will cause fuel injection to be out of time and may cause engine damage.
CAUTION: DO NOT rotate crankshaft when Synchro Positioner (T95T-12200-A) is positioned on CMP synchronizer. Armature tab will be damaged and synchronizer timing may be shifted. Removal
1. Position crankshaft to TDC of cylinder No. 1, on compression stroke. Note position of electrical connector on CMP sensor. 2. Disconnect negative battery cable. Unplug harness connector from CMP sensor. Remove CMP sensor screws and CMP sensor from positioner. Remove synchronizer hold-down bolt and CMP synchronizer.
Fig. 2: Exploded View Of CMP Synchronizer Assembly (Typical) Courtesy of FORD MOTOR CO.
CAUTION: DO NOT rotate crankshaft while synchronizer is removed from engine. Installation
1. Install Synchro Positioner (T95T-12200-A) on synchronizer housing. See Fig. 3 . Rotate synchronizer shaft until vane on shaft aligns with slot on synchro positioner. Rotate synchro positioner until engaged into notch in housing. Dip drive gear in engine oil.
Fig. 3: Installing Synchro Positioner On Synchronizer Assembly (Typical) Courtesy of FORD MOTOR CO.
Fig. 4: Positioning Synchronizer For Installation Courtesy of FORD MOTOR CO. 2. Rotate sychronizer assembly so that synchro positioner is 60 degrees counterclockwise of crankshaft centerline before inserting synchronizer assembly into engine. See Fig. 4 . 3. As synchronizer is inserted into engine, synchronizer will rotate. When seated, synchronizer electrical connector should be located in original position.
CAUTION: If CMP sensor electrical connector is not positioned correctly, DO NOT reposition connector by rotating synchronizer. This may cause fuel system to be out of time with the engine, causing possible engine damage or an engine misfire. Remove synchronizer and reinstall. See step 3 . 4. Install hold-down clamp and tighten bolt to specification. See TORQUE SPECIFICATIONS . Install CMP sensor to synchronizer and tighten to specification. Ensure CMP sensor electrical connector is in original position. Reconnect wiring to CMP sensor. Connect negative battery cable.

The crank posistion sensor is located on the top of the transmission bell housing right next to the motor, its a @$^&^ to get to and do without a lift,

The crank sensor is on the front of your engine behind the harmonic balancer. You will need a balancer puller for a 3.8 and a crank sensor alignment tool to do this lob.

The crankshaft position sensor is located on the transmission bell housing on the right side (if you're facing the engine from the transmission side). The camshaft position sensor is towards the top center of the timing cover on the front of the motor. They both have 3 wire connectors that are virtually identical.

7X Crankshaft Position (CKP) Sensor
Lower rear of engine
4
25
--
24X Crankshaft Position (CKP) Sensor
Right hand side of engine, at end of crankshaft, behind harmonic balancer
7X Crankshaft Position (CKP) Sensor
Lower rear of engine
4
25
--
24X Crankshaft Position (CKP) Sensor
Right hand side of engine, at end of crankshaft, behind harmonic balancer
Right hand side of engine, at end of crankshaft, behind harmonic balancer