Cadillac stopped making the Coupe DeVille after 1993.
If a 2001 Cadillac DeVille shakes when the car is idle, there could be an issue with the powertrain. There could also be a problem with the crankshaft position sensor.
It sounds like there is wires that have a loose connection somewhere. I have a 79 DeVille and the Blower Motor was OK but at the Climate Control Switch that controls the Air/Heat/Fan Speed a loose connection where the wires fit on the Control Switch was loose and a defective Climate Control Switch was the problem on another 79 DeVille. I know there are years between our Cars but this might help you as a Dealership can be expensive. Helminc.com also makes Service Manuals for many makes and models and the Service Manuals are just like the ones at a Dealership. They are a little expensive but worth the investment if you plan to keep your Auto.
Earthquakes can't be stopped. They are a natural event and man has no control over them.
No power, shhhh sound from ehaust pipe when engine is revved up
not affective at all.
they stopped it
They stopped the expansion of Persian control into Europe.
Assuming that the a/c was in good shape before it suddenly stopped working, the problem is probably the blower motor. As it turns out, this is very common. Try searching answered questions under "blower motor 1997 Cadillac Deville" I just had to change mine in a 1996 Deville. Motor aprox. $240.00/Labor aprox. $100.