Circuit/System Description
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The transmission control module monitors the 4th clutch slip Speed when the 4th clutch is applied. The 4th clutch is displayed as Clutch 3 on the scan tool. The transmission control module is part of the control solenoid valve assembly and is not serviced separately.