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.
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HOMESERVICE MANUALSCHEVROLET2002EXPRESS 1/2 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISRESTRAINTS AND SAFETY SYSTEMSAIR BAG SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA DEFINITIONS
2002 Chevrolet Express 1/2 Ton Van V8-5.7L VIN R
Scan Tool Data Definitions
2002 Chevrolet Express 1/2 Ton Van V8-5.7L VIN RSECTION 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: The scan tool displays an 8-digit part number. This number is the GM part number that is stored within the SDM memory.
ADS A/D: The scan tool displays 0-20 volts. This is the auxiliary discriminating sensor signal input to the SDM.
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 #: The scan tool displays the digits of the SDM serial number.
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: The scan tool displays a 3-digit number. The day of the year the module was built.
LF Seat Belt Status: The scan tool displays buckled or unbuckled. The signal from the LF seat belt switch indicates whether the LF seat belt is buckled or unbuckled.
PROM ID: The scan tool displays a 4-digit number. This number is the programmable read-only memory (PROM) ID.
Year Module Built: The scan tool displays what year the module was built.
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.
ADS A/D: The scan tool displays 0-20 volts. This is the auxiliary discriminating sensor signal input to the SDM.
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 #: The scan tool displays the digits of the SDM serial number.
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: The scan tool displays a 3-digit number. The day of the year the module was built.
LF Seat Belt Status: The scan tool displays buckled or unbuckled. The signal from the LF seat belt switch indicates whether the LF seat belt is buckled or unbuckled.
PROM ID: The scan tool displays a 4-digit number. This number is the programmable read-only memory (PROM) ID.
Year Module Built: 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.