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 57 (SERVICING - A/T (VT25-E))REMOVAL & INSTALLATIONTRANSAXLE RANGE SWITCHINSTALLATION (USING OLD SWITCH)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Installation (Using Old Switch)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation (Using Old Switch)
WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Make sure transaxle manual shaft is in Neutral position. Align flats on transaxle shift shaft with flats on transaxle range switch and install switch. Loosely install transaxle range switch bolts.
- Insert Transaxle Range Switch Alignment Tool (J44810) as shown and rotate switch until tool drops into position. See Figure . Transaxle range switch is aligned when pin on tool drops into hole on transaxle range switch. Tighten transaxle range switch bolts to specification. Remove alignment tool.
- Install transaxle range switch lever and nut then tighten to specification. See TORQUE SPECIFICATIONS . Connect transaxle range switch harness connectors. Install control cable assembly to transaxle range switch lever and verify proper operation.
- Position battery tray bracket and tighten screws to specification. See TORQUE SPECIFICATIONS . Install battery cooling box. See BATTERY COOLING BOX .
- Insert battery and tighten battery hold-down screw to specification. Connect positive battery cable to battery and tighten to specification. Connect negative battery cable to battery and tighten to specification. Install battery cooling box cover and tighten screws to specification. See TORQUE SPECIFICATIONS .
- Reprogram radio stations. Adjust transaxle range switch. See TRANSAXLE RANGE SWITCH under ADJUSTMENTS. After adjusting switch, verify engine starts only in Park or Neutral position. If engine starts in any other position, readjust switch.
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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.