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17-NA-265: Flutter or Thump Noise from Rear of Vehicle - (Jul 22, 2019)
Subject: Flutter or Thump Noise from Rear of Vehicle


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Chevrolet
Equinox
2018
2019
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GMC
Terrain

Holden
Equinox


Involved Region or Country
North America, Middle East, Israel, South America, South Korea, Thailand, Egypt, Africa, Australia and New Zealand

Condition
Some customers may comment on hearing a flutter or thump noise from the rear of the vehicle. The noise is most noticeable while driving above 40 km/h (25 mph), with the HVAC off, or in recirculation mode.

Cause
The cause of the condition may be the rear pressure relief valves (PRVs) opening and closing.
 
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