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 MANUALSCHEVROLET2009IMPALA V8-5.3LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGREFRIGERANT PRESSURE SENSOR / SWITCHSERVICE AND REPAIR
2009 Chevrolet Impala V8-5.3L
Refrigerant Pressure Sensor / Switch: Service and Repair
2009 Chevrolet Impala V8-5.3LSECTION Service and Repair
Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement
Special Tools
J 39400-A - Halogen Leak Detector
Removal Procedure
1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (Service and Repair) for the 3.5L engine or Air Cleaner Assembly Replacement (Service and Repair) for the 3.9L engine or Air Cleaner Assembly Replacement (Service and Repair) for the 5.3L engine
2. Disconnect the electrical connector from the A/C refrigerant pressure sensor.
3. Remove the A/C refrigerant pressure sensor from the evaporator tube.
Installation Procedure
1. Replace the O-ring seal for the A/C refrigerant pressure sensor. Refer to O-Ring Replacement (O-Ring Replacement).
Caution: Refer to Fastener Caution (Fastener Caution).
2. Install the A/C refrigerant pressure sensor to the evaporator tube and tighten to4.7 Nm (41 lb in).
3. Connect the electrical connector to the A/C refrigerant pressure sensor.
4. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (Service and Repair) for the 3.5L engine or Air Cleaner Assembly Replacement (Service and Repair) for the 3.9L engine or Air Cleaner Assembly Replacement (Service and Repair) for the 5.3L engine
5. Leak test the fittings of the component using J 39400-A - Halogen Leak Detector.
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.