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 an 8-digit part number. This number is the GM part number that is stored within the sensing and diagnostic module (SDM) memory.
- Battery Voltage
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The scan tool displays 0-20 volts. The ignition represents the system voltage measured by the SDM at its ignition feed.
- Calibration ID
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The scan tool displays a 4-digit number. This calibration ID is the check sum of the SDM read only memory contents.
- Driver Seat Belt Status
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The scan tool displays Buckled or Unbuckled. The signal from the drivers seat belt switch indicates whether the driver seat is buckled or unbuckled.
- Driver Side Impact Sensor ID
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The scan tool displays a 2-digit ID number. The ID signal is sent to the SDM from the driver side impact sensor (SIS).
- Electronic Front End Sensor 1 ID
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The scan tool displays a 2-digit ID number. The ID signal is sent to the SDM from the left front end sensor.
- Electronic Front End Sensor 2 ID
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The scan tool displays a 2-digit ID number. The ID signal is sent to the SDM from the right front end sensor.
- Battery Voltage
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The scan tool displays 0-20 volts. The ignition represents the system voltage measured by the SDM at its ignition feed.
- Julian Date of Build
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This displays the day of the year the module was built.
- Passenger Seat Belt Status
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The scan tool displays Buckled or Unbuckled. The signal from the passenger seat belt switch indicates whether the passenger seat is buckled or unbuckled.
- Passenger Side Impact Sensor ID
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The scan tool displays a 2-digit ID number. The ID signal is sent to the SDM from the Passenger SIS.
- ROM ID
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The scan tool displays a 4-digit number. This number is the read-only memory (ROM) ID.
- Year Module Built
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The scan tool displays what year the module was built.
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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.