A/C Blower - Whistle Noise
90chevy31Number: 90-311-1B
Section: 1B
Date: August 1990
Corp. Bulletin No.: 071203R
Subject: WHISTLE NOISE FROM BLOWER
Model and Year: 1990 CAVALIER, BERETTA AND CORSICA
TO: ALL CHEVROLET DEALERS
Some 1990 J, and L vehicles built between the VIN breakpoints listed below may exhibit a "whistle" noise when the blower is operated under certain conditions. The whistle noise may be experienced under the following operating conditions:
VEHICLES BREAKPOINTS
VEHICLES BREAKPOINTS
L Car
In order to reduce the whistle noise the following procedure should be used. The procedure for N is different than for J & L and is listed below for each carline.
J & L Car
1. Remove blower motor and fan assembly from vehicle.
2. Locate tab (Figure 1) inside blower motor case.
3. Bend tab downward about 20 degrees as shown in Figure 1.
4. Replace blower motor assembly using kit part number 22098839 with some modifications as listed:
Do not use spacer provided in kit. Do not use long screws provided in kit. Do not use extended blower motor cooling tube.
5. Using the fan nut provided in the kit, install original fan on new motor assembly.
6. Install blower motor/fan assembly on vehicle.
WARRANTY INFORMATION:
J CAR
With A/C Without A/C
Labor Operation Number: D1322 D1320
Trouble Codes: 92 92
L CAR
With A/C Without A/C
Labor Operation Number: D1322 D1320
Trouble Codes: 92 92
Refer to the correct model year labor time guide for labor hours.