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.
Removal Procedure
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
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.
- Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
- Remove the accumulator. Refer to Accumulator Replacement .
- Remove the coolant reservoir. Refer to Coolant Recovery Reservoir Replacement in Engine Cooling.
- Remove the evaporator tube nut (3) at the evaporator (1).
- Remove the evaporator tube (4) from the evaporator (1).
- Remove the O-ring seal and discard.
- Remove the nut from the evaporator tube block fitting.
- Separate the evaporator tubes (4, 6) at the block fitting.
- Use the J 26549-E in order to remove the expansion tube. See Special Tools and Equipment .
- Remove the expansion tube from the evaporator tube (6).
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.