Mechanics

PONTIAC GRAND AM HEATER PROBLEM

2000 Pontiac Grand Am

What do I have to take apart to get to the heater core
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Meria weldon
January 26, 2013.




Recover the A/C system. Refer to Refrigerant Recovery and Recharging. See: Refrigerant Service and Repair
Drain the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the evaporator hose from the evaporator.
Remove the heater hoses from the heater core.
Remove the drain tube elbow from the evaporator block heater case plate.

Remove the nuts holding the heater case plate for the heater pipes.
Remove the heater case plate and the seals for the heater pipes.
Remove the nuts holding the heater case plate for the evaporator block.
Remove the heater case plate and seal for the evaporator block.
Remove the nut for the HVAC module assembly bracket.
Lower the vehicle.
Remove the instrument panel (IP) carrier.
Remove the air distribution duct.
Remove the floor air duct from the HVAC module.
Remove the cross vehicle beam (tie bar).

Remove the daytime running lights (DRL) sensor wiring harness clip (1) from the HVAC module assembly.
Disconnect the IP lamp dimmer switch electrical connector (2).
Remove the wiring harness clips (3) from the HVAC module assembly bracket.
Disconnect the vacuum hose (4) from the vacuum tank.

Disconnect the blower motor resistor electrical connector.
Disconnect the blower motor electrical connector.

Disconnect the temperature actuator electrical connector.

Remove the HVAC module assembly.

INSTALLATION PROCEDURE

Position the HVAC module assembly to the vehicle.

Connect the temperature actuator electrical connector.

Connect the blower motor resistor electrical connector.
Connect the blower motor electrical connector.

Install the wiring harness clips (3) to the HVAC module assembly bracket.
Install the driving running lights (DLR) sensor wiring harness clip (1) from the HVAC module assembly.
Connect the IP lamp dimmer switch electrical connector (2).
Install the vacuum hose (4) to the vacuum tank.

Install the cross vehicle beam (tie bar).
Install the floor air duct to the HVAC module.
Install the air distribution duct.
Install the instrument panel (IP) carrier.
Raise the vehicle.

NOTE: Refer to Fastener Notice in Service Precautions.

Install the nut for the HVAC module assembly bracket.

Tighten
Tighten the bracket nut to 10 N.M (88 lb in).

Install the neater case plate and the seals for the heater pipes.
Install the nuts holding the heater case plate for the heater pipes.
Install the neater case plate and seal for the evaporator block.
Install the nuts holding the heater case plate for the evaporator block.

Tighten
Tighten the heater case plates nuts to 10 N.M (88 lb in).

Install the drain tube elbow to the evaporator block heater case plate.
Install the evaporator hose to the evaporator.
Install the heater hoses to the heater core.
Lower the vehicle.
Fill the engine cooling system. Refer to Draining and Filling Cooling System in Cooling System.
Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
Inspect the system operation.
Perform the leak test. Refer to Leak Testing.

See: Testing and Inspection Component Tests and General Diagnostics Leak Testing - HVAC System - Manual

ASEMaster6371
Jan 26, 2013.


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