It is inside the side cover of the transmission. The frame / engine / trans. wil need to be lowered to get the cover off. Tech JK --------------------------------
In the tranny.
its on left side of trans behind side pan
it is in the transmission
TCC (Torque converter clutch) Soleniod in the transmission is likely bad. Hope for that because if not it's a bad torque converter.
It's inside the tranny.
Torque Converter Clutch
The TCC lockup solenoid is on the lower back side the valve body. When replacing it, you will need a new TCC, a new gasket and a new electrical connector.
Try your tcc solenoid on the transmission
The tcc solenoid is part of the od solenoid assembly.
The 1990 Chevrolet Corsica TCC transmission solenoid is located on the top of the transmission. The solenoid will be near the back of the transmission.
Could be a faulty TCC (Torque Converter Clutch) solenoid. Remove the TCC fuse and see if the problem goes away.
You will have better luck getting an answer if you spelled it right. It is a Chevy LUMINA not LUMIA.