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HVAC Air Outlet Shut-off Door(s) Close w/Blower on High (Install Washer(s))

Subject:HVAC Air Outlet Shut-off Door(s) Close with Blower On High (Install Washer(s))

Models:2000 Cadillac DeVille



This bulletin is being revised to update text and warranty information.


Please discard Corporate Bulletin Number 00-01-39-001 (Section 1 -- HVAC).


Condition

Some customers may comment that one or more of the instrument panel (IP) air outlet vent shut-off doors may close when the blower fan is on high.

This condition may occur when the HVAC system is set for automatic operation or when the air outlet shut-off door is manually adjusted to the open position.

Cause

This condition may be due to the control lever on one or more of the air outlet shut-off doors not having sufficient tension to stay in the open position when the blower fan is on high.

Correction

Install washer(s), P/N 5462496, between the air outlet duct housing and the control lever at the pivot point in order to increase the tension. Refer to the following repair procedure.

Repair Procedure

  1. Remove the IP upper trim pad. Refer to the Instrument Panel, Gauges and Console sub-section of the Service Manual.
  2. Remove the hazard warning switch.
  3. 2.1. Disconnect the electrical connector.
    2.2. Release the locking tabs on the hazard switch.

    Object Number: 742121  Size: MF
  4. Remove the control lever from the air outlet shut-off door (1).
  5. 3.1. Insert a small flat-bladed bent screwdriver or similar tool into the control lever's groove (2).
    3.2. Push the tool into the air outlet duct housing and press down on the locking tab.
    3.3. Pull out the control lever.
  6. Install one (or as many as is required) washer (3), P/N 5462496, over the pivot end of the control lever.
  7. Install the control lever to the air outlet shut-off door.
  8. 5.1. Ensure the control lever is connected to the thumbwheel linkage (4).
    5.2. Press the control lever into the air outlet shut-off door until the locking tabs lock.
    5.3. Verify that the air outlet shut-off door operates properly by rotating the thumbwheel (5).
  9. Install the hazard warning switch.
  10. 6.1. Press the hazard switch into the bezel until the locking tabs lock.
    6.2. Connect the electrical connector.
  11. Install the IP upper trim pad. Refer to the Instrument Panel, Gauges and Console sub-section of the Service Manual.

Parts Information

Part Number

Description

5462496

Washer

Parts are currently available from GMSPO.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

D1506

Duct, Air Distribution Outlet Center - R&R or Replace

0.6 hr*

*This is a unique labor operation time to be used only with this bulletin. It will not be published in the Labor Time Guide.