Turn the wipers off, pull the wiper arm off, and replace it in the correct down position.
yes
Replace the paulse board that's attached to the wiper motor.
There is no 1997 Impala.
On the left side there should be a stick for your windshield wipers and a nob on the dash semi-close to the button for the trunk. You turn that nob to set the lights inside and outside the car. The windshield wiper stick if you pull it down, or towards the dash- it should put your brights on.
22" on both sides front however be sure to lookup the correct part numbers for the brand of wipers you're purchasing to ensure getting the right attachment for the impala arms. See related link below.
Have you checked the fuses for the wipers? It may be that simple.
To remove the windshield trim on a 1968 Chevy Impala you will need a trim removal tool that has slides which can release the locking clips.
Buy new ones from your chevy dealer and install them. Takes 10 minutes, costs less that $50.00 and lasts for three years.
go to a repair shop
Should be 20"
Yes they do. They're working just fine.
The most common cause that windshield wipers stop working is a blown fuse. The windshield wiper motor may need to be changed is also common.