Chevrolet Repair: Squeeling Serpentine belt, crankshaft pulley, serpentine belt

Question
I have a 1996 chev K1500 Ext. Cab, 350 5.7.  I just recenly replaced my serpentine belt due to normal wear and tear.  Prior to doing this the belt was not squeaking.  It does now... and appears that the it is getting worse.  I thought it may just need to be stretched a little and would eventually stop.  Any hints on what I could do?  It appears to happen randomly, at idle, while driving, whether or not the heater/air is on, etc... No real pattern.  Thank you for your time any advice is much appreciated.

Answer
I'd check the tensioner to make sure it is holding tension. Is there any chance you got the wrong belt, and the tensioner is at the end of its travel?
And make sure all the grooves are in the correct place on the crankshaft pulley. Grooved side to grooved pulleys, smooth side to smooth pulleys. It is easy to misroute the belt, and still have it close to working correctly.

Van