General Motors has issued a technical service bulletin to address an issue with the 2018-2021 model-year Chevy Equinox and GMC Terrain crossovers that can cause the front windows to automatically lower.
The problem: the front windows in affected vehicles may automatically drop by approximately 1/4 inch (6 mm) or more after the audio system has been played at a loud volume or after playing music with heavy bass. This can also lead to an ‘Open Then Close Driver Window’ message displayed on the Driver Information Center. The issue is caused by the window motor losing memory due to the intense speaker vibration.
The hazards: while this does not pose an immediate safety risk to the driver or vehicle occupants, the issue can cause the front windows to drop enough to cause wind noise and for outside elements to enter the vehicle’s cabin.
The fix: dealers are instructed to install foam between the window motor and the inner door panel to dampen any motor vibration/resonance from the speakers. The Chevy Equinox and GMC Terrain both already come with foam for this purpose, however dealers will move the foam to the inner door panel instead of the motor housing for better dampening.
Affected components: window motor, speaker dampening foam.
- 2018-2021 Chevy Equinox
2018-2021 GMC Terrain
Number of affected vehicles: GM did not say how many Chevy Equinox and GMC Terrain vehicles are affected by this particular issue.
Next steps: GM will notify owners of affected vehicles and instruct them to make an appointment with their dealer for repairs. Customers can also reach out to GM customer service with any questions or concerns related to this service bulletin using the contact information below.
- Chevrolet Customer Service: 1-800-222-1020
- GMC Customer Service: 1-800-462-8782