For 1990-2009 cars

## Heater and Air Conditioning Control Replacement Oldsmobile

### Removal Procedure

1. Remove the accessory trim panel. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages and Console.
2. Disconnect the vacuum hose harness (1) from HVAC control assembly.
3. Disconnect the rear defroster control electrical connector (2) from the HVAC control assembly.
4. Disconnect the vacuum hose harness connector (3) from the HVAC control assembly.
5. Disconnect the blower motor switch electrical connector (4) from the HVAC control assembly.
6. Remove the HVAC control assembly screws.
7. Remove the HVAC control assembly from the accessory trim panel.

### Installation Procedure

1. Install the HVAC control assembly to the accessory trim panel.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the HVAC control assembly retaining screws.

Tighten
Tighten the screws to 2 N·m (18 lb in).

3. Connect the blower motor switch electrical connector (4) to the HVAC control assembly.
4. Connect the vacuum hose harness (3) to the HVAC control assembly. Secure the connector on the tab.
5. Connect the rear defroster control electrical connector (2) to the HVAC control assembly.
6. Connect the vacuum hose harness connector (1) to HVAC control assembly.
7. Install the accessory trim panel. Refer to Instrument Panel Accessory Trim Plate Replacement in Instrument Panel, Gages and Console.

## Heater and Air Conditioning Control Replacement Pontiac

### Removal Procedure

1. Remove the accessory trim plate. Refer to Instrument Cluster Trim Panel Replacement in Instrument Panel, Gauges and Console.
2. Remove the two control assembly screws (1).
3. Remove the control assembly away from the instrument panel (2).
4. Disconnect the vacuum hose harness connector (1) from control assembly.
5. Disconnect the vacuum hose harness (two hose connector) (3) from the control assembly.
6. Disconnect the blower motor switch electrical connector (4) from the control assembly.
7. Disconnect the rear defroster control electrical connector (2) from the control assembly.

### Installation Procedure

1. Connect the vacuum hose harness connector (1) to control assembly.
2. Connect the vacuum hose harness (two hose connector) (3) to the control assembly. Secure the connector on the tab.
3. connect the blower motor switch electrical connector (4) to the control assembly.
4. Connect the rear defroster control electrical connector (2) to the control assembly.
5. Install the control assembly to the instrument panel (2).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

6. Install the control assembly retaining screws.

Tighten
Tighten the control assembly screws (1) to 2 N·m (18 lb in).

7. Install the accessory trim plate. Refer to Instrument Cluster Trim Panel Replacement in Instrument Panel, Gauges and Console.