Exterior Windnoise. Chevrolet PJJ 2000

For 1990-2009 cars

Exterior windnoise is louder when the vehicle is driven with one or more windows down. This noise is caused by air passing over the following locations:

• | The body panels

• | The seams

• | The openings

Ensure that the technician uses the following items during the test drive in order to aid in the leak detection:

• | A mechanic's stethoscope

• | 51 mm (2 in) masking tape

• | Strip caulk

• | A china marking pencil

Notice: The air hose test should only be used on fully cured urethane adhesive. Otherwise, damage to the urethane adhesive bead could result in additional leaks.

While you drive the vehicle, determine the location of the leak by lowering one window at a time. The noise is wind rush if you hear the noise while the following conditions exist:

• | The door window is lowered.

• | The vehicle is being driven.

In order to locate a wind rush, place 51 mm (2 in) masking tape over the various moldings and gaps, one at a time, until the noise is eliminated. When the area causing the wind rush is taped over, the wind rush should no longer occur.

When you locate all of the reported leak conditions, return the vehicle to the shop. Make the permanent repairs. Use the required proper alignment techniques and sealing materials.