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Chevy Cavalier or Olds Calais...
In the computer.
I have a 1990 Olds Calais, and the air filter is located near the driver side below the battery. there a clamp on top of the casing. Hard area to work in. You may need to work under the car.
Do you mean the CO2 sensor? It is in the exhaust manifold where the pipes come together. The sensor looks like a spark plug with one wire coming out of it.
Under the rear of vehicle, just right of center.
on the block towards the firewall........tuner1978
If you don't have the right tools don't attempt to change your struts. Getting the struts of is, easy but you have to have a spring compressor once you get them off also you need a workbench with a vice to remove the spring. Very Dangerous without proper tools.
constant power - orange power when key turned on - yellow
Look in front lower of engine behind radiator
Mileage over 70,000 , Poor control and handling especially during passing and lane changing. As the struts get weaker, tires will develop rapid wear.
I'd guess about $350-$400 at a service center for all four wheels. Struts are not a DIY install, unless you have a strut compressor (not likely if you are asking this question).
The calais is not a very common car anymore (and yes, I do own one, but it a 4cyl). GM puts a few engines in many cars. Please specfiy the engine size (displacement) and you will get an answer.