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The 1990's Cadillac Seville STS vehicles come with (2) independent blowers installed from the factory. The largest blower is the front blower. It is located in the center of the dash and can be accessed from the engine compartment. To remove it, you must cut the hard plastic/rubber shield holding it in place. (YES! You heard right, I said cut it.) It's designed by Cadillac to be removed this way. Cut along the dotted lines. Funny, yet true. With this blower out of commission, you can not get heat or defrosted/de-iced windows cleared. Won't happen.

The other blower is a smaller blower located between the driver/front passenger's seats just behind the gear shift housing. This is controlled by the rear passengers not the driver. This unit will not create enough heat to heat the car. It's heat/cold source is fed by the larger front main blower. Both work independent of the other. When one goes out the other works and vice versa.

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Q: 1993 Cadillac Seville heater blower does not work. Is there an auxiliary heater blower if yes do both need to be changed?
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