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In order to give you a real good guess on the knob, need to know if your climate controller is electronic, vacuum, or cable operated. A Haynes or Chilton's manual would help you here.
To nail down the chirping, use something as a stethoscope CAREFULLY - a broomstick, length of heater hose, or similar. It could be alternator, power steering, AC, or idler pulley.
Last edited by glc; 04-05-2008 at 08:45 AM.
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