Circuit/System Description
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) controls the R3 RUN relay through the run relay coil control circuit by applying voltage to the coil side of the relay. The R3 RUN relay is energized when any of the following conditions are true:
- Ignition Switch is in ACC or RUN.
- The vehicle was remote started.
- The vehicle is in retained accessory power (RAP) mode.