Windshield - Insufficient Clearing in Defrost Mode

File In Section: 1 - HVAC

Bulletin No.: 83-11-12

Date: March, 1998

Subject:
Insufficient Windshield Clearing in the Defrost Mode
(Replace Foam Seals on Defroster Duct)

Models:
1997-98 Chevrolet Venture
1997-98 Oldsmobile Silhouette
1997-98 Pontiac Transport

Condition

Some owners may comment that windshield clearing in the defrost mode, when in certain weather conditions, is not up to their expectations.

Cause

Airflow from the defroster duct outlet (defroster grille) effectively clears the windshield and meets all Manufacturer's and Federal Standards. However, the seal between the instrument panel upper trim and the defroster duct outlet may have moved into the opening and altered the airflow. The defroster duct outlet is made of a material that may not allow the seal adhesive to adhere properly.





Correction

Install new seals with reduced height and new adhesive. These new seals will stop any potential interaction/movement that the instrument panel upper trim may cause. Remove the IP upper trim following the Service Manual procedure in Section 8C and replace both seals on the defroster duct outlet (Figure 1).

Parts Information

P/N Description Quantity

10416005 Seal, Air 2
(1 per pkg) Distribution

Parts are currently available from GMSPO.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation Description Labor Time

D1406 Grille, Defroster Outlet Use Published
- Replace Labor Operation Time
Add Seals, Air Distribution 0.1 hr
- Replace