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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1631 (THEFT DETERRENT SYSTEM - IMMOBILIZER)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA LIST
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Scan Tool Data List
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Scan Tool Data List
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
VTD (Export, RPO AU8)
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition ON, Engine OFF | |||
| 8 Digit GM Part Number | ID Information | Numeric | Varies |
| Auto Learn Counter | Learn Key Data | Counts | Varies |
| Auto Learn Timer Status | Learn Key Data | Seconds | Varies |
| Battery Charger | Data | On/Off | Off |
| Battery State | Data | Normal/High/Low | Normal |
| Battery Voltage | Data | Volts | Varies |
| Calibration ID | ID Information | Numeric | Varies |
| Dash Mode | Data | On/Off | Off |
| Data Fail Enable Flag | Data | On/Off | Off |
| Export Mode | Data | On/Off | On |
| Fail Enable Counter | Data | Counts | Varies |
| First Key Flag | Learn Key Data | On/Off | Off |
| Fuel Continue | Learn Key Data | On/Off | On |
| Fuel Disable Ignition Off | Learn Key Data | On/Off | Off |
| Fuel Disable Timeout | Learn Key Data | On/Off | Off |
| Ignition Counter | Data | Counts | Varies |
| Ignition Cycle Enable | Data | On/Off | On |
| Ignition Voltage | Data | Volts | Varies |
| Incorrect Code Flag | Data | On/Off | Off |
| Indicator Commanded | Data | On/Off/Flash | Off |
| Invalid Key Counter | Data | Counts | Varies |
| Invalid Key Time Out | Learn Key Data | On/Off | Off |
| Julian Date of Build | ID Information | Numeric | Varies |
| Key Not Present Flag | Learn Key Data | On/Off | Off |
| Learn Additional Keys Flag | Learn Key Data | On/Off | Off |
| Learn Coded Key | Data | On/Off | Off |
| Manufacturers Enable Counter | Data | Counts | 0 |
| Master Keys Learned | Learn Key Data | Counts | Varies |
| No. of Learned Key Codes | Learn Key Data | Counts | 2 |
| Password Learning Enable | Learn Key Data | On/Off | Off |
| PROM ID | ID Information | Numeric | Varies |
| Read Complete Flag | Data | On/Off | On |
| Read Key Code | Data | On/Off | On |
| Read Key Timer | Data | Seconds | Varies |
| Report Password | Data | On/Off | On |
| Security Mode | Data | Security Access Allowed/Invlid Key/Maximum Attempts Exceeded/Time Delay/Initialize | Security Access Allowed |
| Start Disable | Data | On/Off | On |
| System Power Mode | Data | Unknown/Off Battery save/Off Asleep/Off Awake/Unlock/Rap Unlock/Accessory/Run/Crank/Rap | Run |
| Tamper Flag | Data | On/Off | Off |
| Theft Problem | Data | On/Off | Off |
| Two Good Keys Flag | Learn Key Data | On/Off | Off |
| Valet Flag | Data | On/Off | Off |
| Valid Code Flag | Data | On/Off | On |
| Vin Received | Learn Key Data | On/Off | On |
| VTD Fail Enable | Data | On/Off | Off |
| VTD Power State | Data | Asleep/Local Wakeup/Request/System/Default | System |
| VTD States | Data | Ignition Off/Normal decision/Learn First Key/Tamper/Monitor Key/fail Enable/Fail Enable Pend//Seedkey Lrn Pend/Seedkey Learn/Auto Learn Pend/Auto Learn/Wakeup/Learn More Keys/No Coded Key/Check Second Key/Auto Lrn. Done/Vin Check/Vin Timer | Monitor Key |
| Year Module Built | ID Information | Numeric | Varies |
RENDER: 1.0x
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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.