Where is the transmission solenoid located on a 1988 Chevrolet celebrity on the inside of the pan or outside?

On a 1988 Chevrolet Celebrity, the transmission solenoid is located inside the transmission pan. Specifically, it is part of the valve body assembly, which is accessible only when the transmission pan is removed. Therefore, to access or replace the solenoid, you would need to drain the Transmission Fluid and remove the pan.