Retained Accessory Power (RAP) Power Mode

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

RAP is a vehicle power mode that permits the operation of selected customer convenience items after the ignition switch is turned OFF. These selected items will remain in operation until a passenger compartment door is opened or until the RAP function timer reaches its limit.

The BCM turns OFF the RAP function and de-energizes the RAP relay when one of the following conditions are met:

The BCM senses the opening of any door or the liftgate.
The BCM detects a decrease in battery capacity below a prescribed limit.
The BCM receives a message from its internal timer indicating the end of the RAP period after 10 minutes.
The transition from OFF to RUN/ON on the ignition switch.

The body control module monitors the ignition switch position, battery condition and passenger compartment door status to determine whether RAP should be initiated. If the ignition switch transitions from RUN/ON to OFF, the battery level is within the acceptable range and the passenger compartment doors are closed, the body control module energizes the RAP relay. This provides power for the following:

DIC
Power window control switches
Power door lock control switches
Steering wheel control switches
Radio
Outside rearview mirror switch