Circuit/System Testing: P0816
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Select the Driver Shift Request parameter.
- Disconnect the automatic transmission manual shift switch connector.
- If the parameter status changes from Downshift to Invalid, replace the DSC shift switch.
- If the parameter status does not change, replace the BCM.