I own a 05 uplander LT and my belt started squeaking bad so I looked at the tensioner and the pulley was sticking a little so I replaced that and it has been working fine for a while now, but the problem as come back and I notice when the A/C is turned on and the engine is revved up a bit. When the A/C is off the problem goes away. Any suggestions out there?

 

Did you replace the belt when you did the tensioner ??

 

Papa Bear,
I did replace the belt with the tensioner, I am at wits end here. As soon as I turn the A/C on high it starts to sqeal and annoys me. I am located overseas and can not take it to a dealer. It sounds like all the noise is coming from one pulley itself and it seems as it might be the one to the right of the altenator, it looks as if it is a stand alone pulley

 

Are you sure the A/C compressor isn't squealing ?? You might spray a little water on the belt while someone revs up the engine... if the noise goes away then it may be the belt.
Good luck and keep troubleshooting...keep us informed.

 

sounds like the a\c compressor seizing up to me

 

So you guys are saying that the A/C compressor might be seizing up, never though of that, but if it is doing that would the A/C continue to work at full throttle?