Beck, you can't tighten or loosen a tensioner. There is no adjustment. I'd like to know what you're doing.

When the squak is present, if you push the idler pulley(towards the trunk end of the car) the squak stops but eventually it will come back. Alex says belt tensioner...

When i say that we tighten or loosen the tensioner, i mean that we put use a socket wrench and loosen it and or tighten it. Oddly enough sometimes the noise stops, after about a 10 - 15 minute run the noise will decrease... when accelerating the noise sounds similar to another supercharger whine(after i hit the throttle I hear the whine and immediatley after the whine another sound similar to the one of the */c is present.

well if yo ucan do that then you definatly need a new tentioner

It sounds to me like you need to replace the tensioner and pully assembly for sure. Don't wait too long either. If that fails, it can cause much more damage to other parts. Some folks here can attest to that.

That just figures anyone know where to get one cheap...

My dad still seems puzzeled... anything else that i could look for to have complete evidence so that he can feel comfortable getting a new tensioner.

Beck, everything you've told us indicates that he needs a new tensioner. It'* not unusual that a tensioner could occasionally fail, especially on a 14 year-old car.

For cheap, you could try a used car service, such as car_parts.com.

A new one could be purchased from gmpartsdirect.com, from your neighborhood parts store, or from your local GM dealer. Note that gmpartsdirect is often very slow on shipping.

I wouldn't put a used tensioner on my car any sooner than I'd buy one used strut. Used tensioners are weak like yours.

You're right! I should have said as much!

but instead you offered up the used part service.

Yes, Captain Obvious...I screwed up...There, ya happy?