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 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.

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.

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.

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 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 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.