Remove eight screws (9) and heater
compartment access panel (10) from heater
Remove six self-tapping screws (12) from dash (5) and two defroster plenums (13). Discard self-tapping
It may be necessary to pry defroster plenums away from dash.
Remove two defroster plenums (13) from dash (5).
Clean sealant from mating surfaces of dash and defroster plenums.
Inspect defroster plenums for cracks, dents or plugged vents.
Replace all damaged parts.