It is behind the distributor at the firewall.
where is the temperture sensor located on a 2002 chevy trailblazer with a 4200 motor
That is the knock sensor.
Fuel Pressure Regulator is located on the fuel rail.
On the left rear side of the block just below the head
Check up by the manifolds or anywhere before the catalytic converter.
It is in the Distributor.
1983 Chevy 305 diagram, waterneck, thermostat housing and fittings
drivers side of engine block
On the drivers side of the block, right above the oil filter.
Left rear side of block just below head
it is a knock sensor that is used to adjust the ignition timing.
possibly the oil pressure sending switch...thats whats on my 87 305 h WRONG!!!!!!!!! the oil pressure switch/sensor is where it always is on pushrod small chevy's, under the distributor. what you see next to the right valve cover are the MAP (Manifold Absolute Pressure) sensor, and below that is the EGR control solenoid