When you shake the PCV valve it should rattle. If it does not rattle then it is probably stuck and should be replaced.
on the side of the transmission
The location of the EGR valve on a 1987 to 1989 Chevy Celebrity depends on which engine the car has. If the car has the 2.8L V6 the EGR valve mounts to the plenum near the throttle body. If the car has the 2.5L 4 cylinder engine the EGR valve mounts in the center of the intake manifold near the valve cover.
The petcock on a 1989 Chevy Celebrity is at the bottom of the radiator on the drivers side.
The PCV valve is on top of the rear valve cover. The air intake plenum extends over the top of the valve making it difficult to see.
The oxygen sensor on a 1989 Chevy Celebrity is located in the rear exhaust manifold on top about the center.
The spark plug gap for your 1989 Chevy Celebrity 2.8 V6 is .045".
Looking in my factory service manual for a 1989 Chevy Celebrity I found no reference to an accessory relay.
The 1989 Chevy Celebrity V6 is rated at 130 hp.
There is no fuse on the alternator.
The thermostat on a 1989 Chevy Celebrity is located under the water outlet fitting. Follow the upper radiator hose, it will end at the water outlet.
No Chevy Celebrity ever had a 4.0L engine
All Chevy Celebrities have rack and pinion steering.