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

Calibration Part Number: The scan tool displays the 8 digit part number of the calibration incorporated into the module

Driver Seat Back Heat Status: The scan tool displays Inactive/Active. When the heated seat is on, the scan tool will display the status of the seat back heating element as Active.

Driver Seat Cushion Heat Status: The scan tool displays Inactive/Active. When the heated seat is on, the scan tool will display the status of the seat cushion heating element as Active.

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

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

Driver Seat HVC Level: The scan tool displays High/Medium/Low. When the any one of the driver seat heated or cooled seat switches are pressed once, the scan tool will display High indicating the high temperature setting. When the switch is pressed a second time, Medium will be displayed, indicating the medium temperature setting. When the switch is pressed a third time, Low will be displayed indicating the low temperature setting.

Driver Seat HVC Mode: The scan tool displays Off/Back & Cushion/Back Only/Cool. When any one of these heated or cool seat switches are pressed, the scan tool will display the switch input to the door module.

Driver Seat Rear Vertical Sensor: The scan tool displays 0-5.0 volts or 0-255 counts. The sensor potentiometer provides an analog voltage which varies directly with the seat rear vertical position. High scan tool values (volts or counts) 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.

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

End Model Part Number: Before the module has been serviced or replaced, the scan tool displays the module production part number. Then, once the module has been replaced, the scan tool will display the new serviced part number.

Front Vertical Downward Switch: 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.

Front Vertical Motor Downward: 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.

Front Vertical Motor Upward: 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.

Front Vertical Upward Switch: 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.

Horizontal Forward Switch: 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.

Horizontal Motor Forward: 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.

Horizontal Motor Rearward : 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.

Horizontal Rearward Switch: 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.

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 Downward Switch: The scan tool displays Inactive/Active. When the driver seat lumbar down switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Lumbar Forward Switch: 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.

Lumbar Horizontal Position -- Memory Data 1: The scan tool displays the volts or count values of the lumbar horizontal position stored in memory for driver 1.

Lumbar Horizontal Position -- Memory Data 2: The scan tool displays the volts or count values of the lumbar horizontal position stored in memory for driver 2.

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

Lumbar Motor Downward: The scan tool displays Inactive/Active. When the driver 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 driver seat lumbar vertical motor in the down direction.

Lumbar Motor Forward: The scan tool displays Inactive/Active. When the driver 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.

Lumbar Motor Rearward: The scan tool displays Inactive/Active. When the driver 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.

Lumbar Motor Upward: The scan tool displays Inactive/Active. When the driver 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.

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

Lumbar Upward Switch: The scan tool displays Inactive/Active. When the driver seat lumbar up switch is activated, the scan tool will momentarily display the switch input to the memory seat module as Active.

Lumbar Vertical Position -- Memory Data 1: The scan tool displays the volts or count values of the lumbar vertical position stored in memory for driver 1.

Lumbar Vertical Position -- Memory Data 2: The scan tool displays the volts or count values of the lumbar vertical position stored in memory for driver 2.

Lumbar Vertical Sensor: The scan tool displays 0-5.0 volts or 0-255 counts. The sensor potentiometer provides an analog voltage which varies directly with the driver seat lumbar vertical position. High scan tool values (volts or counts) 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.

Memory Switch 12 V Ref.: The scan tool displays the voltage supplied to the memory recall switch.

Passenger Seat Back Heat Status: The scan tool displays Inactive/Active. When the heated seat is on, the scan tool will display the status of the seat back heating element as Active.

Passenger Seat Cushion Heat Status: The scan tool displays Inactive/Active. When the heated seat is on, the scan tool will display the status of the seat cushion heating element as Active.

Passenger Seat HVC Level: The scan tool displays High/Medium/Low. When the any one of the passenger seat heated or cooled seat switches are pressed once, the scan tool will display High indicating the high temperature setting. When the switch is pressed a second time, Medium will be displayed, indicating the medium temperature setting. When the switch is pressed a third time, Low will be displayed indicating the low temperature setting.

Passenger Seat HVC Mode: The scan tool displays Off/Back & Cushion/Back Only/Cool. When any one of these heated or cool seat switches are pressed, the scan tool will display the switch input to the door module.

Personalization Option: This is the state of the personalization option as it is stored in the Dash Integration Module (DIM). When the Personalization Option is selected, the scan tool displays the directions to activate or deactivate the personalization option. The asterisk beside the option indicates that the personalization option is activated. The personalization option is normally set to the activated state during the assembly of the vehicle.

Rear Vertical Downward Switch: 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.

Rear Vertical Motor Downward: 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.

Rear Vertical Motor Upward: 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.

Rear Vertical Upward Switch: 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.

Recline Forward Switch: 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.

Recline Motor Forward: 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.

Recline Motor Rearward: 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.

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

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

Seat Front Vertical Position -- Memory Data 1: The scan tool displays the volts or count values of the seat front vertical position stored in memory for driver 1.

Seat Front Vertical Position -- Memory Data 2: The scan tool displays the volts or count values of the seat front vertical position stored in memory for driver 2.

Seat Heat High Ind. Cmd.: The scan tool displays Off/On. When the seat BACK ONLY, BACK/CUSHION or COOL Mode Switch is pressed, 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 seat BACK ONLY, BACK/CUSHION or COOL Mode Switch is pressed, 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 seat BACK ONLY, BACK/CUSHION or COOL Mode Switch is pressed, 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 Back/Cushion 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 Sw.: The scan tool displays Inactive/Active. When the Heated Seat BACK/CUSHION Switch is activated, the scan tool will momentarily display the switch input to the door module as Active.

Seat Horizontal Position -- Memory Data 1: The scan tool displays the volts or count values of the seat horizontal position stored in memory for driver 1.

Seat Horizontal Position -- Memory Data 2: The scan tool displays the volts or count values of the seat horizontal position stored in memory for driver 2.

Seat Rear Vertical Position -- Memory Data 1: The scan tool displays the volts or count values of the seat rear vertical position stored in memory for driver 1.

Seat Rear Vertical Position -- Memory Data 2: The scan tool displays the volts or count values of the seat rear vertical position stored in memory for driver 2.

Seat Recline Position -- Memory Data 1: The scan tool displays the volts or count values of the seat back recline position stored in memory for driver 1.

Seat Recline Position -- Memory Data 2: The scan tool displays the volts or count values of the seat back recline position stored in memory for driver 2.

Seat 1 Back Temp: The scan tool displays 0-255 counts or 0-5.0 volts. The counts or voltage displayed is an input to the climate control seat module from the driver seat back temperature sensor. High scan tool values (counts or voltage) indicate a higher temperature while low values indicate a lower temperature.

Seat 1 Cushion Temp: The scan tool displays 0-255 counts or 0-5.0 volts. The counts or voltage displayed is an input to the climate control seat module from the driver seat cushion temperature sensor. High scan tool values (counts or voltage) indicate a higher temperature while low values indicate a lower temperature.

Seat 2 Back Temp: The scan tool displays 0-255 counts or 0-5.0 volts. The counts or voltage displayed is an input to the climate control seat module from the passenger seat back temperature sensor. High scan tool values (counts or voltage) indicate a higher temperature while low values indicate a lower temperature.

Seat 2 Cushion Temp: The scan tool displays 0-255 counts or 0-5.0 volts. The counts or voltage displayed is an input to the climate control seat module from the passenger seat cushion temperature sensor. High scan tool values (counts or voltage) indicate a higher temperature while low values indicate a lower temperature.

Software Part Number: The scan tool displays the 8 digit part 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.