OEM 2005 GMC Savana 3500 Evaporator

2005 GMC Savana 3500 Parts Questions & Experts Answers

• Q: How to replace the evaporator core in an A/C system on 2005 GMC Savana 3500?

  A: Recovery of refrigerant should be the first step before Evaporator core replacement. First remove the coolant recovery reservoir before disconnecting the low pressure sensor electrical connector together with the Blower Motor assembly electrical connector and Blower Motor resistor assembly electrical connector. The technician should start by removing the retaining nut that fastens the Evaporator inlet tube before using tools to detach the inlet tube retaining screw. The technician will then pull out both the Evaporator inlet tube and its o-ring seal. The technician must first remove the retaining nut on the accumulator before disconnecting it from the Evaporator while extracting the o-ring seal. The technician should begin by unscrewing the blower module assembly screws then remove the blower module assembly before accessing the Evaporator core from the Evaporator and blower module assembly. Place the required pag oil amount directly within the Evaporator when replacing the core. Take the new Evaporator and mount it after installing both the Evaporator assembly with the blower module and securing the assembly with new o-ring seals. You should connect the accumulator to the Evaporator before tightening its retaining nut to 18 n.m (13 lb ft). The installation sequence begins with adding the Evaporator inlet tube to the Evaporator then torquing its retaining nut to 16 n.m (12 lb ft) while tightening the retaining screw. Connect the electrical cables for the Blower Motor resistor assembly as well as the Blower Motor assembly and low pressure sensor electrical connectors. The a/c system evacuation and recharge process should be completed with the installation of the coolant recovery reservoir and subsequent halogen leak detector (J 39400-A) examination of components' fittings.