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 List
The scan tool data lists contain all the instrument panel, gages, and console related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The data list column indicates the location of the parameter within the scan tool menu selections.
Use the scan tool data lists as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with Diagnostic System Check - Instrument Cluster or Diagnostic System Check - Audible Warnings .
Use the scan tool data lists only after the following is determined:
- There is no published DTC procedure nor published symptom procedure for the customer concern.
- The DTC or symptom procedure indicated by the diagnostic system check does not resolve the customer concern.
The typical data values are obtained from a properly operating vehicle under the conditions specified in the first row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the typical data values may reveal the source of the customer concern.
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition ON/Engine OFF/High Beams Off/Doors Closed/Trunk Closed/Park Brake Unapplied | |||
| Brake Fluid Level Switch | BCM Data | On/Off | Off |
| Driver Door Ajar Sw. | Lamp Status | On/Off | Off |
| Ignition 1 | BCM Data | On/Off | On |
| Key in Ignition | BCM Data | On/Off | On |
| Low Coolant Level | BCM Data | On/Off | Off |
| Park Brake Switch | BCM Data | On/Off | Off |
| Park Lamp Input | Lamp Status | On/Off | Off |
| Passenger Door Ajar Sw | Lamp Status | On/Off | Off |
| Security Lamp Status | Security Data | On/Off/Flashing | Off |
| Traction Switch | BCM Data | On/Off | Off |
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition ON/Engine OFF/Seat Belt Buckled/High Beams Off/Park Brake Unapplied | |||
| ABS Lamp | Lamp Status | On/Off | Off |
| Brake Lamp | Lamp Status | On/Off | Off |
| Cluster Manufacture Date | ID Information | Numeric | Varies |
| Display Units | ID Information | English/Metric | English |
| DRL Lamp | Lamp Status | On/Off | Off |
| High Beam Lamp | Lamp Status | On/Off | Off |
| High Coolant Temp Lamp | Lamp Status | On/Off | Off |
| Ignition 1 | Inputs | On/Off | On |
| Ignition 1 | Inputs | Volts | Varies |
| Last 4 Dig of GM Part No. | ID Information | Numeric | Varies |
| Low Coolant Lamp | Lamp Status | On/Off | Off |
| Low Fuel Lamp | Lamp Status | On/Off | Off |
| Low Traction Lamp | Lamp Status | On/Off | Off |
| Module Type | ID Information | Base/Gauge | Varies |
| Oil Pressure Lamp | Lamp Status | On/Off | On |
| PROM ID | ID Information | Numeric | Varies |
| Seat Belt Lamp | Lamp Status | On/Off | Off |
| Service Veh Soon Lamp | Lamp Status | On/Off | Off |
| SIR Lamp | Lamp Status | On/Off | Off |
| Software Release Level | ID Information | Numeric | Varies |
| Traction Off Lamp | Lamp Status | On/Off | Off |
| Trip Reset Switch | Inputs | Active/Inactive | Inactive |
| Trunk Ajar Lamp | Lamp Status | On/Off | Off |
| Upshift Lamp | Lamp Status | On/Off | Off |
| Vehicle Destination | ID Information | Domestic/Japan/Korea/Middle East/Mexico | Varies |
| Vehicle Model | ID Information | Chevrolet/Pontiac | Varies |
| Volt Lamp | Lamp Status | On/Off | On |
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Engine Idling/Normal Operating Temperature | |||
| ECT Sensor | Engine Data 1 Engine Data 2 Engine Data 3 EVAP Data |
Celsius (Fahrenheit) | 85-105°C (185-220°F) |
| Engine Oil Life Remaining | Engine Data 3 | Percent | 0-100% varies |
| Engine Oil Pressure Switch | Engine Data 3 | OK/Low | OK |
| Engine Speed | Engine Data 1 Engine Data 2 Engine Data 3 EVAP Data |
RPM | +/-100 RPM from Desired Idle Speed |
| Fuel Level Sensor | Engine Data 1 EVAP Data |
Percent | 0-100% varies |
| MIL Command | Engine Data 1 | On/Off | Off |
| Vehicle Speed Sensor | Engine Data 1 Engine Data 2 Engine Data 3 EVAP Data |
km/h (mph) | 0 km/h (0 mph) |
NO RELATED
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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.