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 1102 (PERSONALIZATION SYSTEMS)DESCRIPTION AND OPERATIONDRIVER PERSONALIZATIONPROGRAMMING FEATURES ON VEHICLES WITH KEYLESS ENTRY WITHOUT DICREMOTE DRIVER DOOR UNLOCK
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Remote Driver Door Unlock
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Remote Driver Door Unlock
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Continue with the following steps in order to personalize the remote driver door unlock feature:
- Press the UNLOCK button on the correct keyless entry transmitter. The vehicle will chime with the number of chimes corresponding to the current mode, see Remote Driver Door Unlock modes above.
- Press the UNLOCK button on the keyless entry transmitter again in order to advance to the next mode. The vehicle will chime with the number of chimes corresponding to the mode.
- Continue to press the UNLOCK button on the transmitter until the desired mode is reached.
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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.