K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Weatherstrip: All Technical Service Bulletins
Front Door/A-Pillar - Wind Noise
File In Section: 10 - Body
Bulletin No.: 56-15-05A
Date: March, 1996
Subject:
Front Door/A-Pillar Wind Noise
(Install Service Package)
Models:
1988-95 Chevrolet and GMC C/K Models
1990-95 Topkick/Kodiak Models
This bulletin is being revised to change the service procedure, change the glass sealer and adhesive used and change caption wording. Please discard
Corporate Bulletin Number 56-15-05 (Section 10 - Body).
Condition
Some owners may comment that their truck has excessive front door or windshield to door wind noise at the A-pillar area.
Cause
A combination of marginal sealing along the windshield header, and the A-pillar to door crevice gap may contribute to excessive wind noise.
Correction
A new, service-only, A-pillar weatherstrip and repair procedure have been released. This includes applying a bead of glass sealer along the windshield
roof header and installing the new A-pillar seals.
Service Procedure
1.
Take the customer for a test ride in order to verify the condition.
2.
Use masking tape to cover the windshield/roof header gap, and gaps between the windshield and doors at both A-pillars. The purpose in doing this
is to seal off any crevices that might generate a wind noise.
Important:
Remove any aftermarket equipment such as bug deflectors or window deflectors before the test drive.
3.
If this eliminated the customer's concern, remove the masking tape used to cover only the windshield header and re-roadtest. This is to confirm the
need to seal or not seal this area.
4.
If this test failed to isolate the customer concern, determine the root cause by taping up the rest of the vehicle, section by section, until the source
of the wind noise is located.
