replaced serpintin beltand pulley and something still squeeking don't know what else it could be
check and see if you can find where the noise is really comming from could be ur a/c could be your altornator severl other things can make that noise as well
If this has the Vulcan V6, it could very likely be the camshaft position sensor. On my Taurus, I had to replace it about every 60,000 miles.
could also be another pulley wearing out other then the alternator. also check your belts to see if there tight. if one gets lose it will squeak. there also can be some fluid leaking onto the belt
first let me know what motor you got 2nd check your idle wheel on the belt system if it is cracked you need to change it if the belt is of by hair it will shred and squeak