|Subject:||Normal Characteristic – Sub-woofer Is Inoperative With a 2.4L Engine With RPO UW6|
|Models:||2010 – 2015 Chevrolet Equinox|
|2010 – 2015 GMC Terrain|
|with 6 Speaker System (RPO UW6)|
This PI was superseded to update Model Years. Please discard PIT4915C.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customers with a 2.4L engine and RPO UW6 may complain that their subwoofer is inoperative. Equinox and Terrain models with a 4 cylinder engine are equipped with an Active Noise Cancellation (ANC) system – which works to reduce the amount of noticeable noise at certain vehicle speeds. The ANC system works with the vehicle’s audio system to create sound waves that cancel out torque converter clutch (TCC) noise.