Conditions For Setting the DTC: U2007
WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
The BCM is the generator of the SPI serial data synchronizing Clock signal. U2007 is set, in the BCM, when the Clock circuit, is greater than 4.5 v for greater than 5 seconds.