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 MANUALSCHEVROLET2001EXPRESS 1 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGREFRIGERANT PRESSURE SENSOR / SWITCHSERVICE AND REPAIRA/C LOW PRESSURE SWITCH REPLACEMENT
2001 Chevrolet Express 1 Ton Van V8-5.7L VIN R
A/C Low Pressure Switch Replacement
2001 Chevrolet Express 1 Ton Van V8-5.7L VIN RSECTION A/C Low Pressure Switch Replacement
REMOVAL PROCEDURE
1. Remove the coolant reservoir.
2. Disconnect the electrical connector from the A/C low pressure switch (4).
3. Remove the A/C low pressure switch (4) from the accumulator (2).
INSTALLATION PROCEDURE
1. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the liquid line fitting.
2. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.
IMPORTANT: DO NOT allow any of the mineral base 525 viscosity refrigerant oil on the new O-ring seal to enter the refrigerant system.
3. Install the new O-ring seal (3).
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the A/C low pressure switch (4) to the A/C accumulator (2).
Tighten
Tighten the switch to 6 N.m (53 lb in).
5. Connect the electrical connector to the A/C low pressure switch.
6. Install the coolant reservoir.
1. Remove the coolant reservoir.
2. Disconnect the electrical connector from the A/C low pressure switch (4).
3. Remove the A/C low pressure switch (4) from the accumulator (2).
INSTALLATION PROCEDURE
1. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the liquid line fitting.
2. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.
IMPORTANT: DO NOT allow any of the mineral base 525 viscosity refrigerant oil on the new O-ring seal to enter the refrigerant system.
3. Install the new O-ring seal (3).
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the A/C low pressure switch (4) to the A/C accumulator (2).
Tighten
Tighten the switch to 6 N.m (53 lb in).
5. Connect the electrical connector to the A/C low pressure switch.
6. Install the coolant reservoir.
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.