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 1443 (HVAC SYSTEMS - GENERAL SERVICING)REPAIR INSTRUCTIONSCOMPRESSOR REPLACEMENT (LM4)REMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD
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 washer solvent container. Refer to Washer Solvent Container Replacement (Envoy, TrailBlazer) or Washer Solvent Container Replacement (Rainier) in Wipers/Washer System.
- Remove the air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement in Engine Controls.
- Remove the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement in Engine Cooling.
- Release the tension on the air conditioning drive belt.
- Reposition the air conditioning drive belt from the compressor pulley.
- Remove the compressor hose assembly nut from the compressor.
- Remove the compressor hose assembly from the compressor.
- Remove the upper A/C compressor mounting bracket bolts.
- Remove the lower coolant hose. Refer to Radiator Hose Replacement - Inlet (LM4) or Radiator Hose Replacement - Inlet (LL8) in Engine Cooling.
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Disconnect the electrical connection from the compressor.
- Turn the right tire to gain access to the remaining compressor mounting bolts.
- Remove the lower A/C compressor mounting bracket bolts (3).
- Lower the vehicle.
- Reposition the compressor and mounting bracket to access the remaining compressor to bracket bolts.
- Remove the upper A/C compressor mounting bolts (4).
- Remove the A/C compressor.
- Remove the A/C compressor bracket.
- If replacing the A/C compressor. Refer to Compressor Oil Balancing .
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.