GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Cadillac
🢒
2009
🢒
SRX
🢒
HVAC
🢒
Heating, Ventilation, and Air Conditioning
🢒 HVAC Module Assembly Replacement
HVAC Module Assembly Replacement Right Hand Drive
Special Tools
•
J 39400-A
Halogen Leak Detector
•
J 45689
A/C Quick Joint Tool
Removal Procedure
Recover the refrigerant. Refer to
Refrigerant Recovery and Recharging
.
Disconnect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
.
Drain the coolant. Refer to
Cooling System Draining and Filling
.
Disconnect the inlet heater hose from the heater core. Refer to
Heater Inlet Hose Replacement
.
Disconnect the outlet heater hose from the heater core. Refer to
Heater Outlet Hose Replacement
.
Remove the quick connect fitting (1) from the liquid line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Disconnect the A/C liquid line from the evaporator.
Remove and discard the O-rings.
Remove the quick connect fitting (1) from the suction line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Disconnect the A/C suction line from the evaporator.
Remove and discard the O-rings.
Remove the instrument panel (I/P) carrier. Refer to
Instrument Panel Carrier Replacement
.
Remove the air inlet assembly.
Disconnect the HVAC module electrical connector.
Disconnect the HVAC module drain tube (2) from the floor.
Press the tab and release the left rear duct from the HVAC module.
Position the left rear heater duct away from the HVAC module.
Press the tab and release the right rear duct from the HVAC module.
Position the right rear heater duct away from the HVAC module.
Remove the lower left HVAC module mounting nut (1).
Remove the upper left HVAC module mounting nut (1).
Remove the HVAC module from the vehicle.
Remove the foam seals from the A/C evaporator lines.
Remove the foam seals from the heater core pipes.
Installation Procedure
Install new foam seals onto the heater core pipes.
Install new foam seals onto the A/C evaporator lines.
Install the HVAC module into the vehicle.
Caution:
Refer to
Fastener Caution
in the Preface section.
Install the upper left HVAC module mounting nut (1) and tighten to
9 N·m (80 lb in)
.
Install the lower left HVAC module mounting nut (1) and tighten to
9 N·m (80 lb in)
.
Connect the rear heater ducts to the HVAC module.
Connect the drain tube to the bottom of the HVAC module.
Connect the drain tube (2) to the floor.
Connect the HVAC electrical connector.
Install the air inlet assembly.
Install the I/P carrier. Refer to
Instrument Panel Carrier Replacement
.
Install new O-rings to the suction line. Refer to
O-Ring Replacement
.
Install the A/C suction line to the evaporator.
Install the quick connect fitting (1) to the suction line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Install new O-rings to the suction line. Refer to
O-Ring Replacement
.
Install the A/C liquid line to the evaporator.
Install the quick connect fitting (1) to the liquid line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Connect the inlet heater hose to the heater core. Refer to
Heater Inlet Hose Replacement
.
Connect the outlet heater hose to the heater core. Refer to
Heater Outlet Hose Replacement
.
Connect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
.
Fill the coolant. Refer to
Cooling System Draining and Filling
.
Evacuate and recharge the A/C system. Refer to
Refrigerant Recovery and Recharging
.
Leak test the fittings of the component using
J 39400-A
.
HVAC Module Assembly Replacement Left Hand Drive
Special Tools
•
J 39400-A
Halogen Leak Detector
•
J 45689
A/C Quick Joint Tool
Removal Procedure
Recover the refrigerant. Refer to
Refrigerant Recovery and Recharging
.
Disconnect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
.
Drain the coolant. Refer to
Cooling System Draining and Filling
.
Disconnect the inlet heater hose from the heater core. Refer to
Heater Inlet Hose Replacement
.
Disconnect the outlet heater hose from the heater core. Refer to
Heater Outlet Hose Replacement
.
Remove the quick connect fitting (1) from the liquid line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Disconnect the A/C liquid line from the evaporator.
Remove and discard the O-rings.
Remove the quick connect fitting (1) from the suction line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Disconnect the A/C suction line from the evaporator.
Remove and discard the O-rings.
Remove the instrument panel (I/P) carrier. Refer to
Instrument Panel Carrier Replacement
.
Remove the air inlet assembly.
Disconnect the HVAC module electrical connector.
Disconnect the HVAC module drain tube (2) from the floor.
Press the tab and release the left rear duct from the HVAC module.
Position the left rear heater duct away from the HVAC module.
Press the tab and release the right rear duct from the HVAC module.
Position the right rear heater duct away from the HVAC module.
Remove the lower left HVAC module mounting nut (1).
Remove the upper left HVAC module mounting nut (1).
Remove the HVAC module from the vehicle.
Remove the foam seals from the A/C evaporator lines.
Remove the foam seals from the heater core pipes.
Installation Procedure
Install new foam seals onto the heater core pipes.
Install new foam seals onto the A/C evaporator lines.
Install the HVAC module into the vehicle.
Caution:
Refer to
Fastener Caution
in the Preface section.
Install the upper left HVAC module mounting nut (1) and tighten to
9 N·m (80 lb in)
.
Install the lower left HVAC module mounting nut (1) and tighten to
9 N·m (80 lb in)
.
Connect the rear heater ducts to the HVAC module.
Connect the drain tube to the bottom of the HVAC module.
Connect the drain tube (2) to the floor.
Connect the HVAC electrical connector.
Install the air inlet assembly.
Install the I/P carrier. Refer to
Instrument Panel Carrier Replacement
.
Install new O-rings to the suction line. Refer to
O-Ring Replacement
.
Install the A/C suction line to the evaporator.
Install the quick connect fitting (1) to the suction line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Install new O-rings to the suction line. Refer to
O-Ring Replacement
.
Install the A/C liquid line to the evaporator.
Install the quick connect fitting (1) to the liquid line. Refer to
Air Conditioning Line/Tube Connector Removal/Replacement
.
Connect the inlet heater hose to the heater core. Refer to
Heater Inlet Hose Replacement
.
Connect the outlet heater hose to the heater core. Refer to
Heater Outlet Hose Replacement
.
Connect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
.
Fill the coolant. Refer to
Cooling System Draining and Filling
.
Evacuate and recharge the A/C system. Refer to
Refrigerant Recovery and Recharging
.
Leak test the fittings of the component using
J 39400-A
.