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the heater resistor is located under the passenger sides dash (near the passengers feet). there is an access panel that you pull off. some have clips holding it on, some have screws. the blower resistor is located in the blower box. the resistor itself you will not be able to see, only the connector. usually there is about 5 wires on this connector and they are in a row. disconnect the connector, there is usually 1 or 2 screws that hold the resistor in the blower box. remove screws, remove resistor from the blower box. reverse procedure for reassembly. .

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Q: How do you change the heater resistor on a 1999 Pontiac Grand Am?
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