GM Service Manual Online
For 1990-2009 cars only
8-Digit GM Part Number: The scan tool displays the part number of the module.

Battery Voltage: The scan tool displays 0-16 volts. The level of battery voltage at the module.

Calibration ID: The scan tool displays a 4-digit number. This number designates the calibration or program level used in the PROM.

Current: The scan tool displays 0-127.5 amps. The current measured during seat operation.

Front Vertical Sensor: The scan tool displays 0-5.0 volts or 0-255 A/D. The sensor potentiometer provides an analog voltage which varies directly with the seat front vertical position. High scan tool values (volts or A/D) indicate that the seat front is in the up position and low values indicate that the seat front is in the down position.

Hardware Level: The scan tool displays a 4-digit number representing the level of hardware incorporated into the module.

Horizontal Sensor: The scan tool displays 0-5.0 volts or 0-255 A/D. The sensor potentiometer provides an analog voltage which varies directly with the seat horizontal position. High scan tool values (volts or A/D) indicate that the seat is in the forward position and low values indicate that the seat is in the rearward position.

Julian Date of Build: The scan tool displays a 3-digit number. This number is the day of the year that the module was built.

Lumbar Horizontal Sensor: The scan tool displays 0-5.0 volts or 0-255 A/D. The sensor potentiometer provides an analog voltage which varies directly with the lumbar horizontal position. High scan tool values (volts or A/D) indicate that the Lumbar is in the forward position and low values indicate that the lumbar is in the rearward position.

Lumbar Vertical Sensor: The scan tool displays 0-5.0 volts or 0-255 A/D. The sensor potentiometer provides an analog voltage which varies directly with the lumbar vertical position. High scan tool values (volts or A/D) indicate that the lumbar is in the up position and low values indicate that the lumbar is in the down position.

Memory Recall Switches: The scan tool displays 0.43-2.74 volts. When the memory 1 switch is pressed, the scan tool will momentarily display 2.74 volts, when the memory 2 switch is pressed, 1.78 volts is displayed, and when the EXIT switch is pressed, 0.96 volts is displayed.

PROM ID: The scan tool displays a 4-digit number. This is the identification number of the PROM that is incorporated into the module.

Rear Vertical Sensor: The scan tool displays 0-5.0 volts or 0-255 A/D. The sensor potentiometer provides an analog voltage which varies directly with the seat rear vertical position. High scan tool values (volts or A/D) indicate that the seat rear vertical is in the up position and low values indicate that the seat rear vertical is in the down position.

Recline Sensor: The scan tool displays 0-5.0 volts or 0-255 A/D. The sensor potentiometer provides an analog voltage which varies directly with the seat recline position. High scan tool values (volts or A/D) indicate that the seat recline is in the froward position and low values indicate that the seat recline is in the rearward position.

Seat Back Heat Mode Cmd.: The scan tool displays Off/On. When the Heated Seat Back Only Mode Switch is activated, the scan tool will momentarily display On while the output from the door module signals the heated seat module to deactivate the heat from the seat cushion.

Seat Back Heat Mode Ind. Cmd.: The scan tool displays Off/On. When the Heated Seat Back Only Mode Switch is activated, this parameter indicates that the door module has illuminated the Back Only Mode Indicator.

Seat Back Heat Mode Sw.: The scan tool displays Off/On. When the Heated Seat Back Only Mode Switch is activated, the scan tool will momentarily display the switch input to the door module as On.

Seat Cool Mode Switch: The scan tool displays Off/On. When the Heated Seat Cool Switch is activated, the scan tool will momentarily display the switch input to the door module as On.

Seat Forward - Input: The scan tool displays Inactive/Active. When the seat forward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Forward - Output: The scan tool displays Inactive/Active. When the seat forward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat horizontal motor in the forward direction.

Seat Front Down - Input: The scan tool displays Inactive/Active. When the seat front down switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Front Down - Output: The scan tool displays Inactive/Active. When the seat front down switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat front vertical motor in the down direction.

Seat Front Up - Input: The scan tool displays Inactive/Active. When the seat front up switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Front Up - Output: The scan tool displays Inactive/Active. When the seat front up switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat front vertical motor in the up direction.

Seat Heat High Ind. Cmd.: The scan tool displays Off/On. When the Heated or Cool Seat Temperature Switch is activated, this parameter indicates that the door module has illuminated the seat high temperature indicator.

Seat Heat Low Ind. Cmd.: The scan tool displays Off/On. When the Heated or Cool Seat Temperature Switch is activated, this parameter indicates that the door module has illuminated the seat low temperature indicator.

Seat Heat Medium Ind. Cmd.: The scan tool displays Off/On. When the Heated or Cool Seat Temperature Switch is activated, this parameter indicates that the door module has illuminated the seat medium temperature indicator.

Seat Heat Mode Cmd.: The scan tool displays Off/On. When the Heated Seat Heat/Off Temperature Switch is first activated, the scan tool will momentarily display On, while the output from the door module signals the heated seat module to turn on to the High heat mode. With each additional activation of the switch, the heated seat module will increment through the remaining temperature modes (Med/Low/Off).

Seat Heat Mode Switch.: The scan tool displays Off/On. When the Heated Seat Heat/Off Temperature Switch is activated, the scan tool will momentarily display the switch input to the door module as On.

Seat Lumbar Down - Input: The scan tool displays Inactive/Active. When the seat lumbar down switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Lumbar Down - Output: The scan tool displays Inactive/Active. When the seat lumbar down switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the lumbar vertical motor in the down direction.

Seat Lumbar Forward - Input: The scan tool displays Inactive/Active. When the seat lumbar forward switch is activated, the scan tool will momentarily display switch input to the memory seat module as Active.

Seat Lumbar Forward - Output: The scan tool displays Inactive/Active. When the seat lumbar forward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the lumbar horizontal motor in the forward direction.

Seat Lumbar Rearward - Input: The scan tool displays Inactive/Active. When the seat lumbar rearward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Lumbar Rearward - Output: The scan tool displays Inactive/Active. When the seat lumbar rearward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the lumbar horizontal motor in the rearward direction.

Seat Lumbar Up - Input: The scan tool displays Inactive/Active. When the seat lumbar up switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Lumbar Up - Output: The scan tool displays Inactive/Active. When the seat lumbar up switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory module is commanding the lumbar vertical motor the up direction.

Seat Rear Down - Input: The scan tool displays Inactive/Active. When the seat rear down switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Rear Down - Output: The scan tool displays Inactive/Active. When the seat rear down switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat rear vertical motor in the down direction.

Seat Rear Up - Input: The scan tool displays Inactive/Active. When the seat rear up switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Rear Up - Output: The scan tool displays Inactive/Active. When the seat rear up switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat rear vertical motor in the up direction.

Seat Rearward - Input: The scan tool displays Inactive/Active. When the seat rearward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Rearward - Output: The scan tool displays Inactive/Active. When the seat rearward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat horizontal motor in the rearward direction.

Seat Recline Forward - Input: The scan tool displays Inactive/Active. When the seat recline forward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Recline Forward - Output: The scan tool displays Inactive/Active. When the seat recline forward switch is activated or a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat recline motor in the forward direction.

Seat Recline Rearward - Input: The scan tool displays Inactive/Active. When the seat recline rearward switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Seat Recline Rearward - Output: The scan tool displays Inactive/Active. When the seat recline rearward switch is activated or when a memory recall occurs, the scan tool will momentarily display Active while the output from the memory seat module is commanding the seat recline motor in the rearward direction.

Software Level: The scan tool displays the 4-digit number of the software incorporated into the module.

Year Module Built: The scan tool displays a 4-digit number. This number represents the year the module was built.