tensioner

Hi Guys - I need to replace a squeaky tensioner pulley... How do I release the tension to loosen the belt and replace the pulley?? My car's tensioner has a notch in it to stick a socket wrench into to release the tension - but I can't figure out how to do this on my truck (1999 5.2 1500...

I just replaced the tensioner pulley which fixed the grinding, bad bearing noise. but now the belt has a constant squeal.. any ideas?? I replaced just the pulley, the mount didn't need replaced. After changing it, I drove for a day and then the next morning it started squealing. Is the belt...