Tools Required

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

DT-47825 Control Solenoid Test Kit

Fig 1: View Of Control Solenoid (w/Body & TCM) Valve Assembly With Control Solenoid Test Plate

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Filter Plate Assembly
2	Control Solenoid Valve Assembly
3	DT-47825 Control Solenoid Test Plate
4	Air Connection Port
5	Transmission 16-Way Pass-Through Connector
6	Electrical Connector Slide Lock

The purpose of this procedure is to test the functionality of the control solenoid (w/body and TCM) valve assembly solenoids for a gross stuck open or stuck closed condition, or a faulty transmission fluid pressure (TFP) switch. DT-47825 is bolted to the control solenoid (w/body and TCM) valve assembly on the valve body mounting surface. Pressurized air is passed into the aluminum test block, through the control solenoid (w/body and TCM) valve assembly solenoid passage and back to the outlet port on the test block. A scan tool is used to command the solenoids ON and OFF. While observing the airflow, one can determine the valve functionality. The recommended shop air pressure for this test is regulated to 90-100 psi.