Scan Tool Data Definitions

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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.
Active Switch: The scan tool displays enabled or disabled. The signal from the inflatable restraint I/P module disable switch indicates whether the passenger frontal air bag is enabled or disabled.
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 digits of the SDM serial number.
Front End Sensor #1 ID: The scan tool displays a 2-digit ID number. The ID signal sent to the SDM from the left front end sensor.
Front End Sensor #2 ID: The scan tool displays a 2-digit ID number. The ID signal sent to the SDM from the right front end sensor.
Ignition Voltage: The scan tool displays 0-20 volts. Ignition represents the system voltage measured by the SDM at its ignition 1 voltage feed.
Julian Date of Build: The scan tool displays a 3-digit number. An example would be 723. 723 is July 23 which is day 204 based on the Julian Calendar.
Driver Seat Belt Status: The scan tool displays buckled or unbuckled. The signal from the driver seat belt switch indicates whether the driver seat belt is buckled or unbuckled.
Passenger Side Impact Sensor (SIS) ID, (RPO HP2): The scan tool displays a 2-digit ID number. The ID signal sent to the SDM from the SIS.
ROM ID: The scan tool displays a 4-digit number. This number is the read-only memory (ROM) ID.
Year Module Built: The scan tool displays what year the module was built.