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 1493 (KEYLESS ENTRY SYSTEM)DESCRIPTION AND OPERATIONKEYLESS ENTRY SYSTEM DESCRIPTION AND OPERATIONUNLOCK ALL DOORS (SECOND OPERATION)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Unlock All Doors (Second Operation)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Unlock All Doors (Second Operation)
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Momentarily press the UNLOCK button a second time (within 2 seconds of the first press) in order to perform the following functions:
- Unlock the remaining doors.
- Illuminate the interior lamps when the ambient light is low for approximately 30 seconds or until a door is opened.
- Illuminate the exterior lights for approximately 30 seconds or until a door is opened (if selected ON in personalization).
- Disarm the content theft deterrent (CTD) system (if equipped).
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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.