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 1755 (POWER DOOR LOCK SYSTEM AND RELEASE SYSTEMS)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 is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition ON, Engine OFF, All doors closed | |||
| Battery 1 | Door Locks | Volts | Varies |
| Driver Door Switch | Switch Inputs | High/Low | High with door closed |
| Driver Unlock Relay Cmd. | Door Locks | On/Off | Off |
| Driver Unlock Relay Fdbk. | Door Locks | High/Low | Low |
| Liftgate Ajar Switch | Switch Inputs | High/Low | High with liftgate closed |
| Lock All Relay Cmd. | Door Locks | On/Off | Off |
| Lock All Relay Fdbk. | Door Locks | High/Low | Low |
| Lock Switch | Door Locks/Switch Inputs | On/Off | Off |
| Pass Door Switches | Switch Inputs | High/Low | High with doors closed |
| Pass. Unlock Relay Cmd. | Door Locks | On/Off | Off |
| Pass. Unlock Relay Fdbk. | Door Locks | High/Low | Low |
| Remote Lock Cmd. | Door Locks | Yes/No | No |
| Remote Panic Cmd. | Door Locks | Yes/No | No |
| Remote Unlock Cmd. | Door Locks | Yes/No | No |
| Unlock Switch | Door Locks/Switch Inputs | On/Off | Off |
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.