Grand Prix V6-191 3.1L (1989)
Figure 1
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Remove the adapter duct, see Fig. 1.
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Remove the heater outlet duct, see Fig. 1.
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Remove the two top screws from the module, one on each side. These screws will be used to mount the new heater outlet duct, see Fig. 2.
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Install the 1/8 X 3/4 in. foam tape to the grooved mounting surface of the new heater outlet duct, approximately 11-3/4 in. across the top of the
outlet duct and 7 in. on each side. Trim off excess tape.