Kick Panel Fresh Air Vent Water Leaks - V20 P/U 4WD V8-454 74L - 1987
This condition was corrected in production beginning with the following VIN breakpoints:
Janesville
HJ161260
Flint (Pickup)
HF402404
Flint (Suburban/Blazer)
HF162146
St. Louis
HS168304