Retained Accessory Power
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 GMC Yukon XL, 2000 GMC Yukon, 2000 GMC Sierra, 2000 Chevrolet Tahoe, and 2000 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
The Retained Accessory Power (RAP) feature allows power windows, sunroof and radio to be operated after ignition is turned from on to off. Power will be turned off when any door is opened or 20 minutes has elapsed.