[Edit]
= Where is the location for the shift solenoid on a 1999 cavalier? = [Edit]
Sounds like a torque converter lock up solenoid.
drop the pan, then the valve body, the solenoid is above that
The 1995 Cavalier could have a stopped up transmission filter, or a vacuum solenoid problem. These would be the two most likely places to cause the problem.
it have the AB shift solenoid the 3-2 pwm solenoid
thsy are inside the trans
Next to the oil filter
Lock up torque converter solenoid sticking. It is likely the electrical solenoid. You should replace it.
It is possibly the shift interlock solenoid either defective or out of adjustment.
Mounted on top and inside the fuel tank.
Could be a bad overdrive solenoid switch or relay. No, I don't know where they are on this car.
The shift link cable could be broken, or the 1st/2nd shift fork, inside the transmission, could be damaged.
there isn't one... I know I was surprised too. The started has a solenoid right on it and that's it.