Misalignment of the accessory pulleys or a faulty drive belt tensioner may cause a chirping or squeaking sound while the engine is running. In If the replacing the belt tensioner does not correct the noise, the alternator pulley may require replacement.Google+
Car Problem Reports
Chrysler Town & Country Belt Noise Due to Pulley Misalignment or Belt Tensioner
Chrysler Town & Country Problem
Average Mileage: 104,155 mi (50,000 mi - 136,500 mi)
Visitor, 2007 Chrysler Town & Country, 83,520 mi
Noise from the Alternator/Serpentine Belt area when idle. Louder with A/C.
Visitor, 2003 Chrysler Town & Country, 121,000 mi
Just had idler pulley, tensioner, water pump, and serpentine belt replaced. Now hear a chirping noise when A/C is on.
Visitor, 2004 Chrysler Town & Country, 136,500 mi
Noise made by fan belt, when idleing, not a pleasant sound new belt did not help, need ideas to correct offensive sound!
Visitor, 2002 Chrysler Town & Country, 50,000 mi
during cold startup or turing at slow speed. Nver fixed it.
Visitor, 2002 Chrysler Town & Country, 122,220 mi
tensioner failed after replacing new belt and tensioner have a low idle chirp. help