Side Door Glass Lower Seal - Wind Whistle
87chevy10GMC NUMBER: 87-T-62
GROUP: 10 - Body Section
DATE: June, 1987
CORPORATE
NUMBER: 761508
SUBJECT: WIND WHISTLE AT SIDE DOOR GLASS LOWER SEAL
MODELS: 1985-1986 C/K AND 1987 R/V MODELS
FIGURE NO. 1:
Some 1985-1986 C/K and 1987 R/V models may experience a whistling sound at or near the front door glass beltline seal. This sound is due to the window regulator mechanism moving the window away from the beltline seal while in the full up position. The whistling sound may be more pronounced when the A/C control is in the "vent" mode and the blower fan is on medium or high speed. To repair this condition, a new inner beltline door seal, P/N 15569071 (L) and P/N 15569072
(R) has been released for service. This new seal is approximately 3/16 of an inch longer than the original seal. Measurements showing the difference between the old and new seal are shown in Figure No. 1.
The new seal eliminates the need for performing the procedure described in Truck Service Bulletin 86-B-19, dated December, 1985. The following VIN breakpoints identify when the new seal was incorporated into production.
St. Louis Chevrolet HS154946
GMC HS519882
Flint (Pickup) Chevrolet HF390307
GMC HF724416
Flint (Suburban/Blazer) Chevrolet HF152540
GMC HF523110
Janesville Chevrolet HJ145686
GMC HJ517885