Lumina APV V6-191 3.1L (1990)
Evaporator Core: Service and Repair
Fig. 21 HVAC Module Assembly
Fig. 22 A/C Module Assembly Mounting Screw Location
Refer to Fig. 21 when performing the following procedure.
1.
Disconnect battery ground cable.
2.
Drain cooling system, then disconnect heater core inlet and outlet hoses.
3.
Using compressed air, blow air through heater core nipples to remove coolant from core.
4.
Discharge A/C system, then disconnect inlet and outlet hoses at evaporator core.
5.
Remove left side instrument panel sound insulator.
6.
Remove two screws attaching vacuum electric solenoid to heater core cover.
7.
Disconnect vacuum electric solenoid electrical connector.