How do I change the heater core of a 1992 Blazer?
EBSCO Auto Repair Reference Center 1991–92 R/V AND 1991–98 C/K SERIES Disconnect the negative battery cable. Drain the cooling system. Remove the instrument panel glove compartment. Tag and unplug all electrical leads as necessary. Remove the center air distribution duct from the floor. If necessary, remove the ECM and mounting tray. Remove the hinge pillar trim panels. Remove the blower motor cover and then remove the motor. Remove the steering wheel and tilt back the instrument panel slightly. Remove the coolant overflow tank. Disengage the heater hoses at the core connections. Unfasten the attaching screws and nut and then remove the heater case. Remove the seven screws and lift off the heater case cover. Remove the fasteners and brackets that hold the heater core to the case and lift the core from the case. To install: Install the heater core in the case. Install the heater case bottom plate. Make sure there is a good seal. Install the heater case into the truck. Tighten the 4 lowe
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