A/C - Whistle Noise When Blower is Operated
90buick11 Bulletin 90-1-16ADate Sept. '90
Ref.No. 90-177-1A
Corp. Ref. No. 071203R
SUBJECT: WHISTLE NOISE FROM BLOWER - MODIFY BLOWER CASE
MODELS AFFECTED: 1990 SKYLARK
THIS BULLETIN IS BEING REVISED TO INCLUDE ARTWORK FOR FIGURE 1.
Some 1990 Skylark models 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:
VEHICLE BREAKPOINT
WITH AC WITHOUT AC
FROM VIN # TO VIN # FROM VIN # TO VIN #
LM050035 LM060946 LM050070 LM060946
In order to reduce the whistle noise, the following procedure should be used:
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. Install previously removed motor and fan assembly
WARRANTY INFORMATION:
With A/C Without A/C
Labor Operation Number: D1322 D1320
Labor Time: 0.4 hour 0.4 hour
Trouble Code: 92 92