It's pretty straight forward. You will need a 1/2 inch rachet, an 18mm 6 point socket and a cheater bar about 18" to 24" long.
The key to the operation is to know that the bolt is reverse threaded. It loosens by turning to the right (clockwise) and tightens by turning it to the left (counter clockwise). Set the direction of the turn on the rachet. Slip on socket and set it on the bolt. Then slip on the cheater bar over the rachet handle and have at it.
pull the tensioner to relieve the tension and slip the belt over the alternator pulley. The tensioner is a spring-loaded pulley below the alternator. The tensioner takes a special tool that fits into a square hole in the side of it. Or you can use an 18 mm socket on the tensioner's pulley bolt. Follow the decal near the right front corner of the engine compartment to route the new belt.
I have used a socket with a ratchet handle. The ratchet will allow you to get more travel to move the pulley and get the belt off.
There is a tensioner pulley on the belt and this should take care of this. Check the diagram of the belt routing just in front of your radiator. Tensioner pulley may be stuck also
I have a 92 PA with supercharger, so I suspect it would be the same. You need to relax the spring on the tensioner pulley. I found that a ratchet socket wrench will help to do this. Once the tension is released the belt can be slipped off all the other pulleys. There is a diagram on the front of the car to show how a new belt goes back on. You need to relax the tensioner once again to get the belt back on.
These are pressed on pulleys so it is highly advised not to change out the pulley. Your safest bet is to purchase a whole nose cone that already has the pulley size that is needed. We have seen way too many nose drives ruin because people are attempting to use a pulley puller to take it off. Once it is off, you also need to repress it on.
Neglect to replace the supercharger oil.
Loosen the alternator belt with the tensioner pulley. Remove the alternator belt. Remove the wiring harness. Remove the alternator retaining bolts. Reverse the process to install the new alternator.
go to youtube and type in ericthecarguy and change pulley
You move the belt tensioner with a ratchet. Look and you will see that a 3/8 or 1/2 inch ratchet will fit in an opening in the tensioner pulley.
Loosen the tension on the 95 Buick Park Ave belt by moving the belt tensioner to one side. Using a socket and ratchet on the tensioner pulley, pull to the side an remove the belt. Install the new belt an release the tensioner to hold the belt into place.
The tensioner is automatic, no adjustment needed. If you threw the serpentine belt then look for a misaligned pulley or worn tensioner wheel. If you need to move the tensioner to get the belt back on then look for a square hole in the tensioner arm. Use a breaker bar with the appropriate sized square (probably 3/4") to move the arm to get the belt back on. probably tensioner is bad like a failed bearing
There is a spring-loaded tensioner pulley that keeps tension on the belt. The tensioner should have a place to fit a ratchet wrench or breaker bar (may or may not need a socket). The tensioner bar rotates clockwise or counterclockwise to release the tension on the belt. Be sure and note how the belt is routed so you will install the new belt in the same pattern. The tensioner is self-adjusting.