HI Everyone ,
My 2004 F-150 FX4 5.6 when starting has a squeal, as soon as i pull out of the garage and put the AC on the squeal stops , if i do not use the AC and drive for about ten min. it stops , Should i bring to dealer or does anybody have a fix as long as it is not a major problem .

Thanks for all answer's in advance !

Vinnie M.

 

Sounds Like you need a new belt. I would take it do the dealer while under warranty. Good Luck!