GM 52477142 EVAPORATOR KIT, A/C Evaporator

Begin by emptying the air conditioning system and taking off the negative battery cable. Take off the air conditioning lines that link into the heater and evaporator unit on the passenger side of the firewall, while letting all liquids drain from the cooling system. The accumulator with a hose attaches to the evaporator outlet tube for engines with four cylinders, while the accumulator connects directly to the evaporator in V6 engines. Take off the wiring connector under the blower motor resistor, then pull on the large wiring bundle holder from the mounting stud at the upper housing corner. Lift out the coolant recovery tank, disconnect the relay mountings, loosen the nuts that anchor the housing, and remove the housing itself. Carefully unhook the bolts that attach the housing to the firewall, then push forward on the housing to break the strong sticky seal created by the gasket before lifting the housing off. To access the condenser core, remove the housing's upper and lower parts by taking off the clips and screws, then get rid of the condenser, and check for leaks, fixing any bent fins while you're at it. When you put in a fresh evaporator core, keep and move all sealing gaskets from the old unit itself. To reinstall the AC system, start by turning the process upside down, filling your cooling system again, and putting new R-134a-ready connectors on all connections. Lubricate them with the proper air-con oil. Put the foam gasket back when you put the housing back on the firewall. Just before having the system checked for leaks and fixes, fill up the new evaporator with 1 ounce of oil.