The "RAP" relay in a 2003 Chevrolet Impala stands for "Retained Accessory Power" relay. This relay is responsible for providing power to certain accessories in the vehicle even after the ignition switch has been turned off.
It is located on the left side of the dash fuse and relay panel here is the location in the diagrams below. Check out the images (below). Please let us know if you need anything else to get the problem fixed.
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Monday, February 27th, 2023 AT 12:23 PM