It's spring loaded, use a wrench or socket to move it. If it's really stuck it may be seized.
Loosen the tensioner pulley. Put the fan belt around the pulleys. Pry the tensioner pulley to the right until the belt is tight. Tighten the tensioner pulley nut.
You will need to remove the front engine cover, on your 1997 Pontiac Bonneville, in order to change the supercharger belt. Loosen the tensioner pulley to remove the belt.
it has a self tensioner pulley No adjustment required
Loosen 13mm nut that secures tension pulley. Then loosen 13mm nut/bolt just above tensioner assembly facing upwards, to remove tension from belt. Then finally remove the three 10mm bolts holding tensioner assembly to engine block. Install in reverse order.
locate belt tensioner below alternator on pass. side insert 3/8 drive ratchet in center of tensioner pulley rotate to loosen belt remover belt
Remove the center retaining nut on the tensioner. You will need to use something to jam the pulley, so it will not turn.
You actually need a special tool for that (along with elbow grease). They vary by engine size too. Check any big auto store.
Look for the tensioner pulley. There are threads on the tensioner arm that you have to put a bolt into. Turn the bolt and the tensioner will loosen. The belt will slide off. Put the new one on and remove the bolt in the tensioner. 2: I personally use a pair of vise grip and pry the tensionner arm
There is a crankshaft pulley, alternator pulley, power steering pump pulley, AC pulley, idler pulley, tensioner pulley, etc.
The belt tensioner is located at the bottom of the power steering pump looking at it from the front the tensioner is on the bottom left. you could always loosen the alternator up a little. My 1997 with a 4.0 does not have a tensioner pulley, and I believe the 99s are the same. the alternator is the tensioner. Remove one of the bolts and it will swivel in and you can get the belt off
belt tensioner
It will be the smooth pulley(s)-not ribbed.