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 65 (SHIFT INTERLOCK SYSTEMS)REMOVAL & INSTALLATIONSHIFT LOCK SOLENOIDINSTALLATION
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Shift Lock Solenoid: Installation
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Firmly install the shift lock solenoid onto the steering column jacket assembly and the cable shift cam assembly. Connect the electrical connector. See Figure .
- Adjust the shift lock solenoid (with the shift lever clevis in the Neutral position) as follows way:
- Pull out the tab on the adjuster block side of the shift lock solenoid. See Figure .
- Press on the adjuster block to compress the internal adjuster spring which disengages the adjuster teeth. Slide the adjuster block as far away from the solenoid as possible. See Figure .
- Lock the adjuster block in place by pushing in on the tab. See Figure .
- Inspect the shift lock solenoid for the following items:
- The shift lock solenoid must lock the shift lever clevis when the shift lever clevis is put into the Park position.
- Depress the brake pedal to move the shift lever out of the Park position.
- The solenoid will energize.
- Readjust the shift lock solenoid if needed.
- Install the knee bolster. See KNEE BOLSTER TRIM PANELΒ .
- Enable the SIR system. See AIR BAG DEACTIVATION PROCEDURES article in GENERAL INFORMATION.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.