GM Service Manual Online
For 1990-2009 cars only
Battery Voltage Signal - Inputs: The scan tool displays 0-16 V. The voltage measured between the module's battery positive voltage and ground circuits.

Current: The scan tool displays 0-127.5 Amps. The amount of amps used by the selected seat motors during operation.

Driver 1 Memorized Position - Lumbar Forward/Rearward Sensor: The scan tool displays 0-5.0 V. This parameter displays the lumbar horizontal position sensor voltage value that is stored in memory for driver 1.

Driver 1 Memorized Position - Lumbar Up/Down Sensor: The scan tool displays 0-5.0 V. This parameter displays the lumbar vertical position sensor voltage value that is stored in memory for driver 1.

Driver 2 Memorized Position - Lumbar Forward/Rearward Sensor: The scan tool displays 0-5.0 V. This parameter displays the lumbar horizontal position sensor voltage value that is stored in memory for driver 2.

Driver 2 Memorized Position - Lumbar Up/Down Sensor: The scan tool displays 0-5.0 V. This parameter displays the lumbar vertical position sensor voltage value that is stored in memory for driver 2.

Driver Heated Seat Status - HVAC: The scan tool displays Invalid/Off/High/MED/Low. When the driver heated seat is on, the scan tool displays the driver heated seat temperature status signal from the driver position module to the climate control panel as High, MED, or Low. If the scan tool displays Invalid, the HVAC module has determined that there are two switch inputs active at the same time.

Driver Heated Seat Switch - HVAC: The scan tool displays Active/Inactive. When the driver heated seat switch is pressed, the scan tool momentarily displays the switch input to the climate control panel as Active.

Driver Seat Front Vertical Sensor: The scan tool displays 0-5.0 V. The sensor potentiometer provides an analog voltage that varies directly with the seat front vertical position. High scan tool voltage values indicate that the front of the seat cushion is in the upward position, while low voltage values indicate that the front of the seat cushion is in the downward position.

Driver Seat Horizontal Sensor: The The sensor potentiometer provides an analog voltage that varies directly with the seat horizontal position. High scan tool voltage values indicate that the seat is in the forward position, while low voltage values indicate that the seat is in the rearward position.

Driver Seat Rear Vertical Sensor: The scan tool displays 0-5.0 V. The sensor potentiometer provides an analog voltage that varies directly with the seat rear vertical position. High scan tool voltage values indicate that the rear of the seat cushion is in the upward position while low voltage values indicate that the rear of the seat cushion is in the downward position.

Driver Seat Recline Sensor: The scan tool displays 0-5.0 V. The sensor potentiometer provides an analog voltage that varies directly with the seat recline position. High scan tool voltage values indicate that the seat recline is forward, while low voltage values indicate that the seat recline is rearward.

Driver Seat Vent Status - HVAC: The scan tool displays Invalid/Off/High/MED/Low. When the driver vented seat is on, the scan tool displays the driver vented seat status signal from the driver position module to the climate control panel as High, MED, or Low. If the scan tool displays Invalid, the HVAC module has determined that there are 2 switch inputs active at the same time.

Driver Seat Vent Switch - HVAC: The scan tool displays Active/Inactive. When the driver vented seat switch is pressed, the scan tool momentarily displays the switch input to the climate control panel as Active.

Front Vertical Downward Switch: The scan tool displays Active/Inactive. When the seat front vertical down switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Front Vertical Upward Switch: The scan tool displays Active/Inactive. When the seat front vertical up switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Front Vertical Motor Downward: The scan tool displays Active/Inactive. When the seat front vertical down switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat front vertical motor in the down direction.

Front Vertical Motor Upward: The scan tool displays Active/Inactive. When the seat front vertical up switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat front vertical motor in the up direction.

Horizontal Motor Forward: The scan tool displays Active/Inactive. When the seat horizontal forward switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat horizontal motor in the forward direction.

Horizontal Motor Rearward: The scan tool displays Active/Inactive. When the seat horizontal rearward switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat horizontal motor in the rearward direction.

Horizontal Forward Switch: The scan tool displays Active/Inactive. When the seat horizontal forward switch is pressed, the scan tool displays the switch input to the driver position module as ACTIVE.

Horizontal Rearward Switch: The scan tool displays Active/Inactive. When the seat horizontal rearward switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Horizontal Value - Memory Data 1: The scan tool displays 0-5.0 V. This parameter displays the seat horizontal position sensor voltage value that is stored in memory for driver 1.

Horizontal Value - Memory Data 2: The scan tool displays 0-5.0 V. This parameter displays the seat horizontal position sensor voltage value that is stored in memory for driver 2.

Lumbar Downward Switch: The scan tool displays Active/Inactive. When the seat lumbar down switch is pressed, the scan tool displays the switch input to the driver position module as ACTIVE.

Lumbar Forward Switch: The scan tool displays Active/ Inactive. When the seat lumbar forward switch is pressed, the scan tool displays the switch input to the driver position module as ACTIVE.

Lumbar Horizontal Sensor: The scan tool displays 0-5.0 V. The sensor potentiometer provides an analog voltage that varies directly with the seat lumbar horizontal position. High scan tool voltage values indicate that the lumbar support is in the forward position, while low voltage values indicate that the lumbar support is in the rearward position.

Lumbar Motor Downward: The scan tool displays Active/Inactive. When the seat lumbar downward switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat lumbar vertical motor in the downward direction.

Lumbar Motor Forward: The scan tool displays Active/ Inactive. When the seat lumbar forward switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat lumbar horizontal motor in the forward direction.

Lumbar Motor Rearward: The scan tool displays Active/Inactive. When the seat lumbar rearward switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat lumbar horizontal motor in the rearward direction.

Lumbar Motor Upward: The scan tool displays Active/ Inactive. When the seat lumbar up switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat lumbar vertical motor in the upward direction.

Lumbar Rearward Switch: The scan tool displays Active/Inactive. When the seat lumbar rearward switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Lumbar Vertical Sensor: The scan tool displays 0-5.0 V. The sensor potentiometer provides an analog voltage that varies directly with the seat lumbar vertical position. High scan tool voltage values indicate that the lumbar support is in the upward position, while low voltage values indicate that the lumbar support is in the downward position.

Lumbar Upward Switch: The scan tool displays Active/ Inactive. When the seat lumbar up switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Psgr. Seat Vent Status - HVAC: The scan tool displays Invalid/Off/High/MED/Low. When the passenger vented seat is on, the scan tool displays the passenger vented seat status signal from the driver position module to the climate control panel as High, MED, or Low. If the scan tool displays Invalid, the HVAC module has determined that there are 2 switch inputs active at the same time.

Psgr. Seat Vent Switch - HVAC: The scan tool displays Active/Inactive. When the passenger vented seat switch is pressed, the scan tool momentarily displays the switch input to the climate control panel as Active.

Passenger Heated Seat Status - HVAC: The scan tool displays Invalid/Off/High/MED/Low. When the passenger heated seat is on, the scan tool displays the passenger heated seat status signal from the driver position module to the climate control panel as High, MED, or Low. If the scan tool displays Invalid, the HVAC module has determined that there are 2 switch inputs active at the same time.

Passenger. Heated Seat Switch - HVAC: The scan tool displays Active/Inactive. When the passenger heated seat switch is pressed, the scan tool momentarily displays the switch input to the climate control panel as Active.

Recline Forward Switch: The scan tool displays Active/ Inactive. When the seat recline forward switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Recline Motor Forward: The scan tool displays Active/ Inactive. When the seat recline forward switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat recline motor in the forward direction.

Recline Motor Rearward: The scan tool displays Active/Inactive. When the seat recline rearward switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat recline motor in the rearward direction.

Recline Rearward Switch: The scan tool displays Active/Inactive. When the seat recline rearward switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Rear Vertical Downward Switch: The scan tool displays Active/Inactive. When the seat rear vertical down switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Rear Vertical Motor Downward: The scan tool displays Active/Inactive. When the seat rear vertical down switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat rear vertical motor in the downward direction.

Rear Vertical Motor Upward: The scan tool displays Active/Inactive. When the seat rear vertical up switch is pressed or when a memory recall occurs, the scan tool will display Active while the output of the driver position module is commanding the seat rear vertical motor in the upward direction.

Rear Vertical Upward Switch: The scan tool displays Active/Inactive. When the seat rear vertical up switch is pressed, the scan tool displays the switch input to the driver position module as Active.

Seat Front Vertical Exit Position - Memory Data 1: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 1.

Seat Front Vertical Exit Position - Memory Data 2:  The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 2.

Seat Front Vertical Exit Position - Memory Data Default: The scan tool displays 5.0 V. This parameter value is the default voltage value that is displayed for manufacturing purposes.

Seat Front Vertical Position - Memory Data 1: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 1.

Seat Front Vertical Position - Memory Data 2: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 2.

Seat Horizontal Exit Position - Memory Data 1: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 1

Seat Horizontal Exit Position - Memory Data 2: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 2.

Seat Horizontal Exit Position - Memory Data Default: The scan tool displays 5.0 V. This parameter value is the default voltage value that is displayed for manufacturing purposes.

Seat Rear Vertical Exit Position - Memory Data 1:  The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 1.

Seat Rear Vertical Exit Position - Memory Data 2: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 2.

Seat Rear Vertical Exit Position - Memory Data Default: The scan tool displays 5.0 V. This parameter value is the default voltage value that is displayed for manufacturing purposes.

Seat Rear Vertical Position - Memory Data 1:  The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 1.

Seat Rear Vertical Position - Memory Data 2: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 2.

Seat Recline Exit Position - Memory Data 1: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 1.

Seat Recline Exit Position - Memory Data 2: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 2.

Seat Recline Exit Position - Memory Data Default:  The scan tool displays 5.0 V. This parameter value is the default voltage value that is displayed for manufacturing purposes.

Seat Recline Position - Memory Data 1: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 1.

Seat Recline Position - Memory Data 2: The scan tool displays 0-5.0 V. This parameter displays the position sensor voltage value that is stored in memory for driver 2.