I HAVE A 1998 DODGE DURANGO EVERYTIME I IDLE IT IT SQUEAKS I DON'T KNOW WHAT THE PROBLEM IS I CHANGED THE PULLEY CHANGED THE ALTERNATOR
Take a bar of soap and touch it to the edge of your belts with the engine running. Let the belt chew into the soap a little bit. If the squeak suddenly disappears, you know it's just a noisy belt.
Could be a time for a new serpentine belt and tensioner, try to isolate the sound it might also come from the extra wheel in the middle then you need to replace that.
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