SOURCE: 2009 chevy tahoe RAP is
{: ) If your vehicle is equipped with a DIC button, try to press on the button if the lights goes off. Or better yet, remove the connector of the DIC button. If the problem is eliminated, then you may need to replace the DIC button.
Another possible cause is when there are issues with the driver door and the body control module (BCM). The only door that can turn off the radio during RAP is the driver's door. It's possible the door is not giving the proper signals to the BCM. Or it could be the BCM is at fault, some stuck up internal relays or a software issue.
In this case, a scan tool can effectively monitor all these inputs, and eventually speed up diagnosis and make the necessary recommendations.
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