Automatic Transmission Controls Schematics

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: TCM Power, Ground, and Serial Data Schematic - LY7

Courtesy of GENERAL MOTORS CORP.

Fig 2: Shift and TCC Solenoid Valves, TFT Sensor, and Stop Lamp Switch Schematic - LY7

Courtesy of GENERAL MOTORS CORP.

Fig 3: PC Solenoid Valve, Fluid Pressure Manual Valve Position Switch, ISS and VSS Sensors Schematic - LY7

Courtesy of GENERAL MOTORS CORP.

Fig 4: Internal Mode Switch Schematic - LY7

Courtesy of GENERAL MOTORS CORP.

Fig 5: Shift and TCC Solenoid Valves, TFT Sensor, and Stop Lamp Switch Schematic - L26

Courtesy of GENERAL MOTORS CORP.

Fig 6: PC Solenoid Valve, Fluid Pressure Manual Valve Position Switch, ISS and VSS Sensors Schematic - L26

Courtesy of GENERAL MOTORS CORP.

Fig 7: Internal Mode Switch Schematic - L26

Courtesy of GENERAL MOTORS CORP.