Exchanged the shocks front and back on my 1992 Cadillac sevile with new ones which are NOT electronically controlled. Now the car is very rough on rough roads...as if it has no shocks,what to do?

Check the Cadillac Forums website for details.

Well you have electronic controlled suspension which uses air shocks among other components.
The shocks are unique to Cadillac and your model fits various cars from 1998 until 2005.
You can buy replacement parts new, or used. I'm not aware of anyone who makes the shocks in standard form due to the electronic control feature.

Replacing your Cadillac DeVille DTS electronic shocks with these reliable non-electronic shocks is a simple installation procedure. Cadillac air suspension fails because of rubber dry rotting, and then leaking. Your air suspension compressor will eventually fail because of this. Cadillac shocks in the front fail because of the seals in the Cadillac shock wearing down over time. They eventually leak, losing its dampening ability needed for a safe and smooth ride. Try cadillac dealership for a little more info.

A strut is a combination coil spring with the shock absorber inside. From what you describe, the shocks need replacement.

check ingintion coil packs

Only the rear ones should have the air lift feature, although there is a conversion kit that may have been used to add air lift to the front.

The type of shocks you have (front and back) will depend on whether you have the Electronic Suspension system option. Without this, the shocks are pretty standard. However, if you have this, they are all (front and back) controlled electronically to adjust the firmness of the shocks to assist in keeping the vehicle level during maneuvers. You can quickly tell if you have this option by examining one of the shocks to see if there is an electrical connection on the side. If you have this system, these can be very expensive and hard to find, and GM has had a lot of trouble with them. As a result, many owners have replaced them with standard aftermarket struts (which includes air lift versions for the back). However, the old shock electrical cables have to be specially terminated if you do this (see The Cadillac User Forum for more info).

Service Ride Control means one or some of your shocks or struts are worn and may need replacing. The price for new ones is not cheap,

This is a very horrible problem, at least for me. The last time that this happened to me, I decided to cut the top of the shock absorber, since the nut was frozen in place, and you don't have a lot of space to work in there with some special sockets. So I would advice you to cut the very top of the shock absorber rod.

Have a pressure test done on cooling system,may have crack in head or engine block, or head gasket leak.

replace the faulty oil pressure sending unit.