Impala AC issue
Thread Starter
CF Beginner
Joined: Jul 2011
Posts: 1
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Impala AC issue
I have a 2008 Impala - 50,000 miles. When I turn off the motor, there is a knocking in the area of the ac control panel. It lasts about 30 seconds. Also occurs sometimes when I turn on the motor.
CF Veteran
Joined: Mar 2011
Posts: 1,709
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Welcome to the forum.
Does it sound like an air door flapping (perhaps the recirculation mode door)? Sometimes an actuator goes out of synchronization and thus the HVAC control module needs to go through the relearn procedure. This requires a visit to the service department.
Does it sound like an air door flapping (perhaps the recirculation mode door)? Sometimes an actuator goes out of synchronization and thus the HVAC control module needs to go through the relearn procedure. This requires a visit to the service department.
Official GM Rep
Joined: Mar 2010
Posts: 4,163
Likes: 27
From: Global Headquarters in Detroit, MI
kmslattery,
I am sorry to hear that you are experiencing this issue. I agree with EinST that you would need to visit your service department. Please let me know if you take your vehicle to the dealership.
Thank you,
Elizabeth, Chevrolet Customer Service
I am sorry to hear that you are experiencing this issue. I agree with EinST that you would need to visit your service department. Please let me know if you take your vehicle to the dealership.
Thank you,
Elizabeth, Chevrolet Customer Service
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