Torque Converter Clutch (TCC) Solenoid

Disconnect harness connector to TCC solenoid. Measure resistance between TCC solenoid terminals "A" and "D". Solenoid resistance should be greater than 20 ohms. See Figure and Figure.

Fig 1: 2.5L Torque Converter Clutch Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 2: 4.3L , 5.0L & 5.7L Torque Converter Clutch Schematic

Courtesy of GENERAL MOTORS CORP.

NOTE: Some solenoids have an internal pressure switch in series with the solenoid winding and will not show continuity until transmission hydraulic pressure is applied. See Figure.