OEM 2003 Chevrolet Express 3500 Evaporator

2003 Chevrolet Express 3500 Evaporator Parts Questions & Experts Answers

• Q: How to replace the evaporator core in an A/C system on 2003 Chevrolet Express 3500?

  A: The first step for Evaporator core replacement requires the recovery of refrigerant from the a/c system. Terminate the electrical connections of the low pressure sensor and the Blower Motor assembly and the Blower Motor Resistor assembly. Start by removing the retaining nut from the inlet tube and then proceed to remove the tube while also taking out the sealing washer. The procedure calls for removing first the retaining nut from the Evaporator outlet tube followed by the outlet tube before taking out its sealing washer. You should start by removing the front cover retaining screws from both the Evaporator and blower module assembly before taking out the front cover and the Evaporator core. The exact pag oil dosage should be applied to the condenser before adding the new Evaporator core. After setting the new Evaporator core within the Evaporator and blower module assembly you should secure the front cover along with its screws at 6 n.m (53 lb in). The installer should mount new o-ring seals onto the tubes that lead into and out of the Evaporator before fastening the Evaporator inlet tube with its retaining nut adjusted to 16 n.m (12 lb ft). Rephrase this procedure also for the Evaporator outlet tube and its retaining nut installation. Users should reconnect the low pressure sensor electrical connector and then attach the Blower Motor assembly electrical connector followed by the Blower Motor Resistor assembly electrical connector. The a/c system evacuation follows recharge procedures and requires a testing of component connection fittings using halogen leak detector (J 39400-A).