How do you replace the alternator on a 1995 Chevy Cavalier?

Disconnect the battery terminals

Make note of the serpentine belt routing so that you can put it all back.

Using a 1/2 inch breaker bar in the hole of the tensioner arm, back off the pressure enough to get the belt off the alternator.

Disconnect the electrical plugs and all other wires making note of where things go.

Remove the bolts holding the alternator in place.

Put the replacment alternator back in place going in reverse order of the above.