Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Scan Tool Data Definitions
The SIR scan tool data definitions contain a brief description of all SIR related parameters available on the scan tool. The parameters that are available on the scan tool are listed below in alphabetical order.
- 8-Digit GM Part Number
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The scan tool displays the GM part number that is stored within the sensing and diagnostic module (SDM) memory.
- Calibration ID
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The scan tool displays the calibration ID, which is the check sum of the SDM read only memory contents.
- Component Serial Number
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The scan tool displays the SDM component serial number that is stored within the SDM.
- Driver Side Belt Status
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The scan tool displays whether the driver seat belt is buckled or unbuckled.
- Ignition Voltage
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The scan tool displays 0-20 volts. This is the system voltage measured by the SDM between the ignition input and ground.
- Julian Date of Build
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This number represents the day of the year that the module was built.
- Left SIS ID
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The scan tool displays the driver side impact sensor (SIS) ID that is sent to the SDM when the ignition is turned ON.
- Passenger Seat Belt Status
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The scan tool displays whether the driver seat belt is buckled or unbuckled.
- PROM ID
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The scan tool displays the programmable read-only memory (PROM) ID.
- Right SIS ID
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The scan tool displays whether the passenger SIS ID that is sent to the SDM when ignition is turned ON.
- VIN Information
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The scan tool displays a list. The body control module (BCM) is programmed in the assembly plant with the last four digits of the SDM part number and the VIN of the vehicle.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.