V 3500 P/U 4WD V8-350 5.7L VIN M 4-bbl (1987)
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FIGURE 1
PROCEDURE:
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Remove fresh air vent assembly as described in Section 1A of the Service Manual.
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Apply sealer as shown in Figure No. 1E
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Snap extension into position over existing water deflector.
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Reinstall fresh air vent assembly.
This condition was corrected in production beginning with the following VIN breakpoints:
Janesville
HJ523044
Flint (Pickup)
HF729089