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 105 (AUTOMATIC TRANSMISSION SERVICING)REMOVAL & INSTALLATIONEXTENSION HOUSING ASSEMBLYREMOVAL
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Extension Housing Assembly: Removal
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Raise and suitably support the vehicle. Support the transmission with a transmission jack. Place a drain pan under the vehicle.
- Remove the propeller shaft. See appropriate DRIVESHAFT & UNIVERSAL JOINTS article in DRIVE AXLES. Remove the transmission mount.
- Remove the case extension bolts (1). Remove the case extension (2). See Figure . Remove and discard the case extension O-ring seal (3).
RENDER: 1.0x
NO RELATED
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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.