That is going to be yor blower motor resistor located under the right side of the dash, parts are cheap, and install easy
jim
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Thursday, March 1st, 2007 AT 1:21 PM
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My 1998 Chevy Venture Van, 3.4, with 78,000 miles on it has the heat/ac fan speed switch that works only on the highest speed of 5. Speeds 1 to 4 do not work. How can I replace or repair switch or other part necessary to get working again?