I just replaced the serpentine belt on my 1999 cavalier Z24 today. There is a tention pully that constantly pushes on the belt to keep it tight. There is a bolt head in the middle of this pully. Normally it's 15mm. You'll need an open end wrench to put on the bolt head. Put it on and turn it counter clockwise. You'll feel the entire pully move and you will see your belt loosen. It's not a good idea to let go of the pully. Try to keep pressure on it till you get the new belt in place. Like I said I have a 99 Cavy there may be some differences but it should go about the same for you.
The 2001 Chevy Cavalier parking brake has an adjustment bolt on the parking brake assembly. Turn the adjustment bolt to loosen or tighten the parking brake.
Loosen the tensioner pulley on your 2001 Chevy Impala. The serpentine belt will become loose. Take the old belt off and put the new belt on. Tighten the new serpentine belt with the tensioner pulley.
Providing your cavalier has a 2.2l, this is what your looking at.
Put the serpentine belt on to the pulleys of your 1994 Chevy engine. Tighten a serpentine belt with the tensioner pulley.
Put the new serpentine belt on to your 1992 Chevy Corsica pulleys. Push the tensioner pulley to the left to tighten the serpentine belt.
put a wrench on it as to tighten the bolt. That will release the tension. You can also push down on it but that will require a second person to remove the serpentine belt.
usually serpentine belts get their tension(tightness) from the belt tensioner
It has a serpentine belt and has a self adjusting tensioner.
If it is a serpentine belt you replace the tensioner pulley
This diagram is under the hood. Look for it
The Alternator is mounted solidly to the engine. It does not adjust. You have to use a wrench to pry back the Serpentine Belt Tensioner ,, remove the belt ,, and then remove all of the bolts that hold the Alternator on.
http://wiki.answers.com/Q/How_do_you_tighten_your_alternator_belt_1992_Chevy_Cavalier"