I'm thinking maybe my belt tensioner might be starting to go?

I'll crank it up in the morning and once I put it in gear to start moving I can hear the serperntine belt squeal just like the old v--band setups used to. I simply blip the throttle and it shuts up for the rest of the day.

160k on an 01 3.0 x5. belt is new and has maybe 10k miles on it.