Cadillac Repair: 1995 AND 1998 DEVILLE AIR BAG SYSTEM, floor pan, steering wheel

Question
Where is the module located in the car.

Answer
The air bag modules are located on the steering wheel and the other is above the glove box.

I suspect what your looking for is the control box (Sensing and diagnostic module) SDM. Which is located under the drivers front seat mounted on the floor pan on the 95.

The 88 is located in the same place as the 95.