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Pressure Switch Assembly

Install Jumper Harness (J39775) to transmission 20-pin connector. Compare resistance of pressure switches with gear selector in each position to known values. See Fig 2. If resistance values are the same as chart, problem is intermittent. If resistance values are not the same, complete chart until problem is found.

TRANSMISSION COMPONENT RESISTANCE SPECIFICATIONS

Component Ohms
Pressure Control Solenoid 3-7
TCC Solenoid 21-33
TCC PWM & 3-2 Control Solenoid 10-15
1-2 & 2-3 Shift Solenoids 19-31
TFT Sensor
At 68°F (20°C) 3088-3942
At 212°F (100°C) 159-198
Vehicle Speed Sensor
At 68°F (20°C) 1150-1250
At 212°F (100°C) 1725-1825
Fig 1: Identifying Component & Connector Terminal Locations Courtesy of General Motors Corp.
G96D04453
Fig 2: Pressure Switch Assembly Resistance Chart Courtesy of General Motors Corp.
G96F04454