Labor - Revised Air Inlet Replacement Operation Number

File In Section: 1 - HVAC

Bulletin No.: 66-12-04A

Date: November, 1996

Subject:
Wind Rush Noise from Right Side Dash with Maximum A/C on and Low Blower Speed (Replace Air Inlet Assembly and Gasket)

Models:
1995-96 Chevrolet and GMC S/T Models
1996 Oldsmobile Bravada with Air Conditioning

This bulletin is being revised to change the labor operation number. Please discard Corporate Bulletin Number 66-12-04 (Section 1 - HVAC)

Condition

Some owners may comment about a wind rush type noise from the right side of the dash when the A/C control is at the maximum position and the fan blower control is on low speed. The noise will usually start at about 35 MPH (57 kph) and get louder as vehicle speed increases.

Cause

The air inlet assembly door is not sealing properly.

Correction

Verify the Recirculation Door Actuator is functioning properly. Replace the air inlet assembly and gasket per the applicable S/T Truck Service Manual, Section 1A.

Parts Information

P/N Description Qty

52457315 Air Inlet Assembly 1
52458500 Gasket 1

Parts are currently available from GMSPO.

Warranty Information

For vehicles repaired under warranty, use:

Labor Op Description Labor Time
Air Conditioning 3.0 hrs
D2109 Module Components,
Replace