I am in no way a mechanic, only a do it yourselfer that has had these GCs for the past 10 years or so.
So here goes....
It could be that another pulley may not be fully functional - the harmonic ballancer could be wobbly and causing the belt to eventually squeak. If all the pulleys are not lined up correctly the new belt may work for a bit then eventually start to squeak.
Start the van, pop the hood and take a look at the belt and see if you see any wobble on the belt. Look down at where the bottom most pulley ( harmonic ballancer/crankshaft pulley) is and see if it is wobbling.
The overrunning alternator decoupler (oad) pulley if bad/worn makes a clunking sound and doesn't function as it should if bad.
I hope this points you in the correct direction to getting your squeak silenced for good.
Good luck.
So here goes....
It could be that another pulley may not be fully functional - the harmonic ballancer could be wobbly and causing the belt to eventually squeak. If all the pulleys are not lined up correctly the new belt may work for a bit then eventually start to squeak.
Start the van, pop the hood and take a look at the belt and see if you see any wobble on the belt. Look down at where the bottom most pulley ( harmonic ballancer/crankshaft pulley) is and see if it is wobbling.
The overrunning alternator decoupler (oad) pulley if bad/worn makes a clunking sound and doesn't function as it should if bad.
I hope this points you in the correct direction to getting your squeak silenced for good.
Good luck.