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 1418 (PERSONALIZATION SYSTEMS)DESCRIPTION AND OPERATIONDRIVER PERSONALIZATIONPROGRAMMING FEATURES WITH THE DRIVER INFORMATION CENTER (DIC)AUTOMATIC DOOR LOCKS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Automatic Door Locks
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Automatic Door Locks
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. 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 automatic door locks:
- The DIC displays AUTOMATIC LOCKING.
- Press the Select button in order to enter the menu. The first choice seen is the current setting.
- Press the Select button in order to scroll through the following options:
- LOCK DOORS MANUALLY
- LOCK DOORS WITH SPEED
- LOCK DOORS OUT OF PARK
- Press the Personalization button in order to advance to the next option. The DIC displays AUTOMATIC UNLOCKING.
- Press the Select button in order to enter the menu. The first choice seen is the current setting.
- Press the Select button in order to scroll through the following options:
- UNLOCK DRIVER IN PARK
- UNLOCK ALL IN PARK
- UNLOCK ALL AT KEY OUT
- UNLOCK DOORS MANUALLY
- Press the Personalization button in order to advance to the next option.
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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.