Just came across this thread. Did anyone figure out what the ANT on the screen means/does?

 

Nope. Never figured it out. I was trying this on the bench and not in the car. Someone might try it in the car and see if it does something.

 

I thought that was for when removing and installing the Antenna mast.

What you have to do is, with the key in the ignition switch "LOCK" position, press the "AM"”and "DISC"”buttons on the radio simultaneously with turning the ignition switch to "ACC."” Then the radio"LCD"display will read "ANT"”and the antenna mast will hyper-extend, disengaging the cable. With the ignition switch still in "ACC,"” the new cable is inserted to a full stop into the motor antenna assembly through the mast pipe hole in the body panel, with the teeth on the antenna cable toward the rear of the vehicle. Then, as the person in the driver's seat switches the key to "LOCK," feed the cable and mast pipe in. After it retracts completely, replace the retaining nut.

 

this is absolutely correct.