Hello 
  
I'm trying to figure out why on start up of engine 
there's a squeel that sounds like it coming from alternator 
or ac pump perhaps, then goes away after a few minutes. 
  
I tried dressing belt but have not had adjustment checked yet. 
Vehicle has 42k miles, seems a little premature for bearing failure. 
Just started recently with cool weather. 
  
Appreciate any comments/ sugeestions 
  
thanks