Installation Procedure Buick Century VI

Installation Procedure

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1. Connect the electrical connectors.
2. Install the HVAC control module. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the HVAC control module mounting screws. Tighten Tighten the screws to 2 N.m (18 lb in).
4. Install the front floor console. Refer to CONSOLE REPLACEMENT - FRONT FLOOR (D06) in Instrument Panel, Gages, and Console. IMPORTANT: Do not adjust any controls on the HVAC control module while the HVAC control module is calibrating. If interrupted improper HVAC performance will result.
5. Start the engine and run for one minute.

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1. Remove the right side IP insulator Panel. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.
2. Disconnect the electrical connector from the blower motor control processor.
3. Disconnect the blower motor control processor electrical connector from the blower motor. IMPORTANT: The opening to the blower motor control processor is slotted. Access to the blower motor control processor opening is limited.
4. Loosen both of the forward bolts.
5. Remove the rearward bolt. IMPORTANT: Tilt down the rear of the blower motor control processor.
6. Remove the blower control processor.

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1. Install the blower motor control processor. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
2. Install the blower motor control processor rearward screw. Tighten Tighten the screw to 1.5 N.m (13 lb in).
3. Tighten the blower motor control processor forward screws. Tighten Tighten the screws to 1.5 N.m (13 lb in).
4. Connect the blower motor control processor electrical connector to the blower motor.
5. Connect the electrical connector from the blower motor control processor.
6. Install the right side IP insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.

Scheme 461

1. Remove the instrument panel compartment. Refer to COMPARTMENT REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
2. Remove the right instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.
3. Disconnect the vacuum line from the recirculation actuator.
4. Lift the retaining tab in order to release the recirculation actuator and slide the actuator off of the mounting bracket.
5. Disconnect the vacuum actuator plunger rod from the recirculation lever.
6. Remove the recirculation actuator.

Scheme 462

1. Install the recirculation actuator.
2. Connect the recirculation actuator plunger rod to the recirculation door, then extend the plunger. IMPORTANT: During installation, ensure that the recirculation actuator retaining tab is positioned above the mating base on the HVAC control module case.
3. Push the vacuum actuator toward the HVAC control module case to secure the retaining tab. IMPORTANT: Verify that the vacuum actuator pushrod is not binding on the recirculation lever.
4. Connect the vacuum harness connector to the recirculation actuator.
5. Install the instrument panel compartment. Refer to COMPARTMENT REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
6. Install the right instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.

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1. Remove the left instrument panel insulator. Refer to TRIM PAD REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
2. Remove the instrument panel knee bolster bracket. Refer to KNEE BOLSTER REPLACEMENT in Instrument Panel, Gages and Console.
3. Disconnect the vacuum line from the mode actuator.
4. Lift the lock tab up (1) to remove the actuator.
5. Remove the mode actuator off the slides of the HVAC module assembly.
6. Disconnect the actuator pushrod from the mode door lever and remove the actuator.

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1. Connect the actuator pushrod to the mode door lever.
2. Position the actuator on to the slides of the HVAC module assembly.
3. Ensure that the lock tab (1) locks the actuator.
4. Connect the vacuum lines to the mode actuator.
5. Install the instrument panel knee bolster bracket. Refer to KNEE BOLSTER REPLACEMENT in Instrument Panel, Gages and Console.
6. Install the left instrument panel insulator. Refer to TRIM PAD REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.

Scheme 469

1. Remove the right instrument panel insulator panel. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.
2. Remove the I/P compartment. Refer to COMPARTMENT REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages, and Console.
3. Disconnect the two vacuum lines from the defroster actuator (3).
4. Disconnect the orange vacuum line from the recirculation actuator and install a hand vacuum pump (2).
5. Remove the defroster actuator from its attachment to the HVAC module case.
6. Using the hand vacuum pump (2) open the recirculation actuator door to the full position.
7. Rotate the defroster actuator to the right and up into the opening between the back of the dash and the opening into the HVAC module.
8. Disconnect the defroster actuator from the defroster door arm.

Scheme 470

1. Install the defroster actuator to the defroster door arm and snap into place on the HVAC module.
2. Connect the vacuum line to the actuator.
3. Remove the hand vacuum pump (2) and reinstall the vacuum line to the recirculation actuator.
4. Install the I/P compartment. Refer to COMPARTMENT REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
5. Install the right instrument insulator panel. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.

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1. Remove the right side instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.
2. Remove the instrument panel compartment. Refer to COMPARTMENT REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
3. Disconnect the electrical connector from the right air temperature actuator.
4. Remove the screws which secure the right air temperature actuator.
5. Remove the electric actuator.

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1. Position the right air temperature actuator, then align the slots in the electric actuator driver to the flats on the shaft.
2. Align the locating hole to the alignment on the HVAC module case.
3. Slide the actuator driver on to the shaft. The actuator driver should seat completely on the shaft and the mounting holes should be flush with the mounting bolts on the HVAC module case. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the screws to the right air temperature actuator. Tighten Tighten the screws to 1.5 N.m (13 lb in).
5. Connect the electrical connector to the right air temperature actuator.
6. Install the instrument panel compartment. Refer to COMPARTMENT REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
7. Install the right side instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.
8. Calibrate the actuator. Refer to «RE-CALIBRATING ACTUATORS»(/buick/century/vi-1997-2005/remont/automatic-hvac-system/#hvac-systems-automatic__re-calibrating-actuators) .

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1. Remove the left instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - LEFT in Instrument Panel, Gages and Console.
2. Remove the knee bolster. Refer to KNEE BOLSTER REPLACEMENT in Instrument Panel, Gages and Console.
3. Disconnect the electrical connector from the left air temperature actuator.
4. Remove the mounting screws from the left air temperature actuator.
5. Remove the left air temperature actuator.

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1. Position the left air temperature actuator, then align the slots in the electric actuator driver to the flats on the shaft.
2. Align the locating hole to the alignment pin on the HVAC module case.
3. Slide the actuator driver on to the shaft. The actuator driver should set completely on the shaft and the mounting holes should be flush with the mounting bolts on the HVAC module case. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the mounting screws to the left air temperature actuator. Tighten Tighten the screws to 1.5 N.m (13 lb in).
5. Connect the electrical connector to the left air temperature actuator.
6. Install the knee bolster. Refer to KNEE BOLSTER REPLACEMENT in Instrument Panel, Gages and Console.
7. Install the left instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - LEFT in Instrument Panel, Gages and Console.
8. Calibrate the actuator. Refer to «RE-CALIBRATING ACTUATORS»(/buick/century/vi-1997-2005/remont/automatic-hvac-system/#hvac-systems-automatic__re-calibrating-actuators) .

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1. Remove the right side instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.
2. Disconnect the electrical connector from the vacuum control assembly.
3. Disconnect the vacuum harness connector from the vacuum control assembly.
4. Remove the mounting screws from the vacuum control assembly. IMPORTANT: Pull the vacuum control assembly straight down to release the tab from the slot in the HVAC module case.
5. Remove the vacuum control assembly.

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1. Align the tab to the slot in the HVAC module case, then push up to seat the vacuum control assembly. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
2. Install the mounting screws to the vacuum control assembly. Tighten Tighten the screws to 1.5 N.m (13 lb in).
3. Connect the vacuum harness connector to the vacuum control assembly.
4. Connect the electrical connector to the vacuum control assembly.
5. Install the right side instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages and Console.

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1. Remove the instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages, and Console.
2. Remove the instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - LEFT in Instrument Panel, Gages, and Console.
3. Disconnect the vacuum hoses from the vacuum tank.
4. Remove the screws that secure the vacuum tank to the HVAC module.
5. Remove the vacuum tank.

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1. Install the vacuum tank to the HVAC control module. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
2. Install the screws to the vacuum tank. Tighten Tighten the screws to 1.5 N.m (13 lb in).
3. Connect the vacuum hoses to the vacuum tank.
4. Install the instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - RIGHT in Instrument Panel, Gages, and Console.
5. Install the instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT - LEFT in Instrument Panel, Gages, and Console.

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1. Remove the instrument panel trim pad. Refer to TRIM PAD REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.
2. Remove the passenger side SIR inflator module. Refer to Inflatable Restraint Instrument Panel Module Replacement in Air Bag Restraints System.
3. Remove the brake pedal. Refer to Brake Pedal Assembly Replacement in Disc & Drum.
4. Remove the bolts from the steering column support bracket and remove the bracket.
5. Remove the screws from the right and left side air distribution ducts.
6. Remove the air distribution ducts.
7. Remove the bolts from the relay bracket and position the relay bracket aside.
8. Remove the bolts from the BCM bracket and position the BCM bracket aside.
9. Release the wiring harness retaining clips from the cross vehicle beam and position the wiring harness aside.
10. Remove the two screws below the fuse block that hold the main harness connector to the cross vehicle beam.
11. Remove the bolts from the center support bracket of the HVAC module.
12. Remove the center support bracket of the HVAC module.
13. Remove the bolts from the upper support brackets of the HVAC module.
14. Remove the bolts which secure the left cross vehicle beam to the hinge pillar.
15. Remove the bolts which secure the right cross vehicle beam to the hinge pillar.
16. Remove the bolt (1) from the cross vehicle beam.
17. Remove the cross vehicle beam from the vehicle.
18. Remove the retaining screws (1) from the air distribution case cover.
19. Remove the air distribution case cover (2).
20. Pull the aspirator up and out of the HVAC module assembly.
21. Remove the aspirator hose from the aspirator.

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1. Install the aspirator hose to the aspirator.
2. Install the aspirator into the case.
3. Install the air distribution case cover (2). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the air distributor cover retaining screws (1). Tighten Tighten the screws to 1.5 N.m (13 lb in).
5. Install the cross vehicle beam to the vehicle.
6. Install the bolts which secure the right cross vehicle beam to the hinge pillar. Tighten the bolts finger tight.
7. Install the bolts which secure the left cross vehicle beam to the hinge pillar. Tighten the bolts finger tight. Tighten Tighten all the bolts to 20 N.m (15 lb ft).
8. Install the bolt (1) to the cross vehicle beam. Tighten Tighten the bolt to 20 N.m (15 lb ft).
9. Install the bolts to the upper support brackets of the HVAC module. Tighten Tighten the bolts to 10 N.m (89 lb in).
10. Install the center support bracket to the HVAC module.
11. Install the bolts to the center support bracket of the HVAC module. Tighten Tighten the bolts to 10 N.m (89 lb in).
12. Install the instrument panel wiring harness on to the cross vehicle beam and secure the retaining clips.
13. Install the two screws below the fuse block that hold the main wire harness connector to the cross vehicle beam.
14. Install the BCM bracket and the bolts. Tighten Tighten the bolts to 10 N.m (89 lb in).
15. Install the relay bracket and the bolts. Tighten Tighten the bolts to 10 N.m (89 lb in).
16. Install the right and left side air distribution duct bolts. Tighten Tighten the bolts to 1.5 N.m (13 lb in).
17. Install the support bracket for the steering column. Tighten Tighten the bolts to 50 N.m (37 lb ft).
18. Install the brake pedal. Refer to Brake Pedal Assembly Replacement in Disc & Drum.
19. Install the passenger side SIR inflator module. Refer to Inflatable Restraint Instrument Panel Module Replacement in Air Bag Restraints System.
20. Install the instrument panel trim pad. Refer to TRIM PAD REPLACEMENT - INSTRUMENT PANEL (I/P) in Instrument Panel, Gages and Console.

Scheme 511

1. Disconnect the electrical connector (1) from the ambient air temperature sensor (3) that is located on the right front radiator air baffle.
2. Remove the push-in retainer (2) from the ambient air temperature sensor.
3. Remove the ambient air temperature sensor (3) from the radiator air baffle.

Scheme 512

1. Align the ambient air temperature sensor (3) to the radiator air baffle.
2. Install the push-in retainer (2) to the ambient air temperature sensor.
3. Connect the electrical connector (1) to the ambient air temperature sensor.
4. Drive the vehicle at a speed of 32 km/h (20 mph) for approximately one and a half minutes or at a speed of 72 km/h (45 mph) for approximately one minute in order to obtain the ambient update.

Scheme 513

1. Remove the instrument panel cluster (IPC) trim plate. Refer to TRIM PLATE BEZEL REPLACEMENT - INSTRUMENT PANEL (I/P) CLUSTER in Instrument Panel, Gages, and Console.
2. Remove the electrical connection at the air temperature sensor.
3. Remove the air temperature sensor from the aspirator hose.

Scheme 514

1. Connect the air temperature sensor to the aspirator hose.
2. Connect the electrical connector for the sensor.
3. Install the IPC trim plate. Refer to TRIM PLATE BEZEL REPLACEMENT - INSTRUMENT PANEL (I/P) CLUSTER in Instrument Panel, Gages and Console.

Scheme 515

1. Remove the instrument panel upper trim pad. Refer to TRIM PANEL REPLACEMENT - INSTRUMENT PANEL (I/P) UPPER in Instrument Panel, Gages and Console.
2. Disconnect the sunload air temperature sensor and the daytime running lamp light sensor from the defroster grille.
3. Disconnect the electrical connector from the sun load air temperature sensor.
4. Remove the sunload sensor.

Scheme 516

1. Connect the electrical connector to the sun load sensor.
2. Install the sun load air temperature sensor and the daytime running lamp light sensor to the defroster grille.
3. Install the instrument panel upper trim pad. Refer to TRIM PANEL REPLACEMENT - INSTRUMENT PANEL (I/P) UPPER in Instrument Panel, Gages and Console.