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The spark plugs are under the intake manifold aka upper plenum ,in the center of the valve cover gaskets , on a 1997 Catera. Unplug the hoses and electrical wire clip/connections (you may want to mark the 4 hoses in the back for reattachment at removal), unbolt the intake manifold or aka upper plenum , you will then see the wires that go into the center of the valve covers , pull the plug boot and you can access the spark plugs. usually boots and wires covered in oil recommend replacement of valve cover gaskets at the same time. If covered in oil replacement of spark plug wires isa must.
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Diagram of 1999 catera spark plug replacement?
How do I replace the spark plugs in a 1999 Cadillac Catera?
How do you change the spark plugs on a 2000 catera cadillac?
The spark plugs are under the throttle body on my 1997 Catera, assume they are in the same place on your 2000. Just unplug the hoses and electrical wire clip/connections, unbolt the throttle body and you will be able to access the plugs.
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head gasket!
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