Check the manifold, just before the headpipe.
The oxygen sensor on a 1989 Chevy Celebrity is located in the rear exhaust manifold on top about the center.
No
The oxygen sensor is in the middle of the exhaust manifold near the firewall.
Yes. Look in the yellow pages for aftermarket a/c's
Chevy did not use a crank sensor on that year.
That year did not have a cam sensor.
where do I find it
In the 1989 Grand Prix, the oxygen sensor is in the tail pipe. Look for a wire that is plugged into both the tail pipe and the undercarriage of the vehicle.
yes, it does have Oxygen sensors
In the exhaust manifold or downpipe
According to fordparts.com the 1989 Ford Mustang GT has ( 1 ) oxygen sensor
Need to know what engine it has.