Diagnostic Aids
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.
When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. With a scan tool, monitor the PC Sol. 2 Pressure Command and the TFP Switch 3 state parameters. Operate the vehicle in drive to obtain 72 km/h (45 mph) for at least 10 seconds, stop the vehicle, turn the ignition Off for at least 30 seconds. Perform this operation 2 times. When the PC Sol. 2 Pressure Command is Yes, the transmission fluid pressure switch 3 state should be high. When the PC Sol. 2 Pressure Command is No, the TFP switch 3 state should be Low.