For 1990-2009 cars

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: The scan tool displays an 8-digit part number. This number is the GM part number that is stored within the SDM memory.
Calibration ID: The scan tool displays a 4-digit number. This calibration ID is the check sum of the SDM read only memory contents.
Component Serial Number: The scan tool displays the SDM manufacturing source\shipping code.
Driver Resistance: The scan tool displays the resistance value of the steering wheel module deployment loop.
Driver Side Belt Status: The scan tool displays Buckled or Unbuckled. The signal from the drivers seat belt switch indicates whether the driver seat is buckled or unbuckled.
Ignition Voltage: 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: This number represents the day of the year the module was built.
Passenger Resistance: The scan tool displays the resistance value of the I/P deployment loop.
PROM ID: The scan tool displays a 4-digit number. This number is the programmable read-only memory (PROM) ID.
Restraint ID: The scan tool displays the seventh digit of the VIN which defines the type of restraint system the vehicle has. There will be either a 2 or a 4. The 2 represents a frontal air bag system and the 4 represents a frontal and side air bag system.
Year Module Built: The scan tool displays what year the module was built.