As it says, the main belt on my '05 V6 was squealing, mainly between 2k and 3k rpm's but typically only when the engine was warm. I did a quick visual inspection & saw that the flat side of the belt looked a LITTLE worn and brown.
So I went to apply some belt dressing (engine cool) to see if it would cure it on my way into work... while applying the belt started squealing then JUMPED off the tensioner.
Anyone have some mechanical advise? I'm reasonably mechanically inclined but I don't like going into this blind. I'm searching now for a service manual.