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Transmission Solenoid Information

GM5647608Courtesy of GENERAL MOTORS COMPANY
GEN 1

Valve Body Bore Location/Call Out Component Code/Name Function Type Resistance Value @ 20°C (68°F)
6 Q77A Transmission Control Solenoid Valve 1 Clutch Control C1 (1 - 2 - 3 - 4 - 5 - 6 - R) Linear, Normally Low 5.0 to 5.4 ohms
3 Q77B Transmission Control Solenoid Valve 2 Clutch Control C2 (1 - 2 - 8 - 9 - 10 - R) Linear, Normally Low 5.0 to 5.4 ohms
4 Q77C Transmission Control Solenoid Valve 3 Clutch Control C3 (2 - 3 - 4 - 5 - 7 - 9 - 10) Linear, Normally Low 5.0 to 5.4 ohms
1 Q77D Transmission Control Solenoid Valve 4 Clutch Control C4 (4 - 5 - 6 - 7 - 8 - 9 - 10 - R) Linear, Normally Low 5.0 to 5.4 ohms
2 Q77E Transmission Control Solenoid Valve 5 Clutch Control C5 (1 - 3 - 5 - 6 - 7 - 8 - 9) Linear, Normally Low 5.0 to 5.4 ohms
5 Q77F Transmission Control Solenoid Valve 6 Clutch Control C6 (1 - 2 - 3 - 4 - 6 - 7 - 8 - 10 - R) Linear, Normally Low 5.0 to 5.4 ohms
8 Q77G Transmission Control Solenoid Valve 7 Line Pressure Variable Force, Normally Low 5.0 to 5.4 ohms
7 Q77H Transmission Control Solenoid Valve 8 Torque Converter Clutch Variable Force, Normally High 5.0 to 5.4 ohms
GM5527125Courtesy of GENERAL MOTORS COMPANY
GEN 2

Valve Body Bore Location/Call Out Component Code/Name Function Type Resistance Value @ 20°C (68°F)
A Q77A Transmission Control Solenoid Valve 1 Clutch Control C1 (1 - 2 - 3 - 4 - 5 - 6 - R) Linear, Normally Low 5.0 to 5.4 ohms
B Q77B Transmission Control Solenoid Valve 2 Clutch Control C2 (1 - 2 - 8 - 9 - 10 - R) Linear, Normally Low 5.0 to 5.4 ohms
C Q77C Transmission Control Solenoid Valve 3 Clutch Control C3 (2 - 3 - 4 - 5 - 7 - 9 - 10) Linear, Normally Low 5.0 to 5.4 ohms
D Q77D Transmission Control Solenoid Valve 4 Clutch Control C6 (1 - 2 - 3 - 4 - 6 - 7 - 8 - 10 - R) Linear, Normally Low 5.0 to 5.4 ohms
E Q77E Transmission Control Solenoid Valve 5 Clutch Control C5 (1 - 3 - 5 - 6 - 7 - 8 - 9) Linear, Normally Low 5.0 to 5.4 ohms
F Q77F Transmission Control Solenoid Valve 6 Clutch Control C4 (4 - 5 - 6 - 7 - 8 - 9 - 10 - R) Linear, Normally Low 5.0 to 5.4 ohms
T Q77H Transmission Control Solenoid Valve 8 Torque Converter Clutch Variable Force, Normally Low 5.0 to 5.4 ohms
AB Q77G Transmission Control Solenoid Valve 7 Line Pressure Variable Force, Normally High 5.0 to 5.4 ohms
1 M123 Transmission Park Valve Lock Solenoid Actuator - - 15 to 25 ohms
2 B316 Transmission Park Valve Position Switch Transmission Park Valve Position Sensor 1 0.78 to 0.82 V 1.98 to 2.02 V
Transmission Park Valve Position Sensor 2 0.78 to 0.82 V 1.98 to 2.02 V
GM5527092Courtesy of GENERAL MOTORS COMPANY
AUX

Call Out Number Component Code TCM Scan Tool Parameter Type Resistance Value @ 20°C (68°F)
1 Q77J Transmission Control Solenoid Valve 9 Default Disable
* Solenoid is needed to achieve 2nd, 7th and Reverse when a fault is present.
ON/OFF 18 to 22 ohms
2 B315A Transmission Range Control Valve 1 Position Switch Transmission Range Control Valve 1 Position Switch Status - -