Buick Regal: Suspension Position Sensor Calibration

Calibration Criteria

NOTE: Remove any excess weight and do not sit in the vehicle during the headlamp leveling sensor learn procedure. Any additional weight will cause the calibration of the front and rear suspension position sensors to be inaccurate and affect the operation of the headlamp leveling system.

The headlamp leveling sensor learn procedure must be performed after a suspension position sensor has been removed/reinstalled/replaced, or if the headlamp leveling control module has been serviced. The learn procedure will set the front and rear suspension position sensors home value. This value is used by the headlamp leveling control module to determine the movement of the front and rear suspension systems. The headlamp leveling control module compares the information from both suspension position sensors and adjusts the headlamp leveling as needed.

Calibration Procedure

1. Ignition ON/vehicle in Service Mode.
2. Install a scan tool.
3. Navigate to the Configuration/Reset Functions menu of the Headlamp Control Module.
4. Select Configuration/Reset Functions.
5. Select Headlamp Leveling Sensor Learn procedure and follow the directions displayed on the screen.

HEADLAMP LED DRIVER MODULE REPLACEMENT

Preliminary Procedure

Headlamp Replacement.

1. Headlamp LED Driver Module Screw [3x]
   CAUTION: Fastener Caution
   Tighten 2.5 N.m (22 lb in)
2. Headlamp LED Driver Module
   Procedure
   1. Disconnect the electrical connector.
   2. After installation, aim the headlamps.

HEADLAMP CONTROL MODULE REPLACEMENT (T4L WITH T95 AND UVG)

1. Headlamp Control Module Nut [2x]
   CAUTION: Fastener Caution
   Tighten 9 N.m (80 lb in)
2. Headlamp Control Module
   Procedure
   1. Disconnect the electrical connector.
   2. Perform the necessary programming and setup procedure: Control Module References

HEADLAMP CONTROL MODULE REPLACEMENT (T4L WITHOUT T95 AND UVG)

Preliminary Procedure

Headlamp Replacement.

1. Headlamp LED Driver Module Bolt [3x]
   CAUTION: Fastener Caution
   Tighten 2.5 N.m (22 lb in)
2. Headlamp Control Module
   Procedure
   1. Disconnect the electrical connectors.
   2. Run all necessary programming and setup procedure.

FRONT FOG LAMP REPLACEMENT

Preliminary Procedure

Front Fog Lamp Bezel Replacement (Base) Front Fog Lamp Bezel Replacement (YWC).

1. Front Fog Lamp Bolt [3x]
   CAUTION: Fastener Caution
   Tighten 2.5 N.m (22 lb in)
2. Front Fog Lamp
   Procedure
   1. Disconnect the electrical connector.
   2. Replace bulbs as necessary.

FRONT FOG LAMP BRACKET REPLACEMENT

Preliminary Procedures

1. Front Bumper Fascia Replacement.

2. Front Fog Lamp Replacement.

1. Front Fog Lamp Bracket
   Procedure
   Unlock the retaining tabs in direction of the arrow.

FRONT FOG LAMP AND FRONT OBJECT SENSOR WIRING HARNESS REPLACEMENT

Preliminary Procedures

1. Front Bumper Fascia Replacement.

2. Front Bumper Fascia Energy Absorber Replacement.

1. Front Fog Lamp and Front Object Sensor Wiring Harness Retainer [6x]
2. Front Fog Lamp and Front Object Sensor Wiring Harness
   Procedure
   1. Disconnect the electrical connectors.
   2. Unlock the retaining tabs.

FRONT SIDE MARKER LAMP REPLACEMENT

Preliminary Procedure

Front Wheelhouse Liner Replacement (LGX) Front Wheelhouse Liner Replacement (LTG).

1. Front Side Marker Lamp
   Procedure
   1. Disconnect the electrical connector.
   2. Squeeze the front side marker lamp retainer, pull outward and down to remove front side marker lamp from the fascia.
   3. Transfer components as necessary.

FRONT SIDE TURN SIGNAL LAMP REPLACEMENT

1. Front Side Turn Signal Lamp
   Procedure
   1. Use a flat bladed plastic tool to remove.
   2. Unlock the retaining tabs in direction of the arrow.
   3. Disconnect the electrical connector.
   4. Replace bulbs as necessary.

HIGH MOUNT STOP LAMP REPLACEMENT (WAGON)

Preliminary Procedure

Rear End Spoiler Replacement (5-Door Wagon 35).

1. High Mount Stop Lamp Bolt [2x]
   CAUTION: Fastener Caution
   Tighten 2.5 N.m (22 lb in)
2. High Mount Stop Lamp
   Procedure
   Disconnect the electrical connector.

HIGH MOUNT STOP LAMP REPLACEMENT (HATCHBACK)

Removal Procedure

1.

Liftgate Upper Side Trim Finish Panel (2) - Remove.

2.

High Mount Stop Lamp Nut (1) - Remove [4x].

3. Disconnect the electrical connector.

4. Release the retaining tab.

5. Apply a double layer of masking tape around the perimeter of the painted surfaces.

6.

Using a flat-bladed trim tool, apply appropriate force between the taped surface and high mount stop lamp (1) to release.

7.

High Mount Stop Lamp (1) - Remove.

Installation Procedure

1.

High Mount Stop Lamp (1) - Install.

2. Remove the double layer of masking tape around the perimeter of the painted surfaces.

3. Connect the electrical connector.

4.

CAUTION: Refer to Fastener Caution.

High Mount Stop Lamp Nut (1) - Install and tighten [4x] 2.5 N.m (22 lb in).

5.

Liftgate Upper Side Trim Finish Panel (2) - Install.

REAR BODY STRUCTURE STOP LAMP REPLACEMENT (5-DOOR HATCHBACK 68)

Preliminary Procedure

Open the rear compartment side trim panel service flap.

1. Rear Body Structure Stop Lamp Nut [2x]
   CAUTION: Fastener Caution
   Tighten 2.5 N.m (22 lb in)
2. Rear Body Structure Stop Lamp
   Procedure
   1. Unlock the retaining tabs.
   2. Disconnect the electrical connector.
   3. Replace bulbs as necessary.

REAR BODY STRUCTURE STOP LAMP REPLACEMENT (5-DOOR WAGON 35)

Removal Procedure

1. Liftgate - Open.

2.

Rear Body Structure Stop Lamp Cap (1) - Remove [2x].

3. Unlock the retaining tabs.

4.

Rear Body Structure Stop Lamp Bolt (1) - Remove [2x].

5. Rear Body Structure Stop Lamp (2) - Remove.

6. Unlock the retaining tabs.

7. Disconnect the electrical connector.

8. Replace bulbs as necessary.

Installation Procedure

1.

CAUTION: Fastener Caution.

Rear Body Structure Stop Lamp (2) - Install.

2. Connect the electrical connector.

3. Rear Body Structure Stop Lamp Bolt (1) - Install and tighten [2x] 2.5 N.m (22 lb in).

4.

Rear Body Structure Stop Lamp Cap (1) - Install [2x].

5. Liftgate - Close.

REAR LICENSE PLATE LAMP REPLACEMENT

1. Rear License Plate Lamp
   Procedure
   1. Unlock the retaining tabs.
   2. Disconnect the electrical connector.
   3. Replace bulbs as necessary.

TAIL LAMP REPLACEMENT (5-DOOR HATCHBACK 68)

1. Liftgate Lower Trim Finish Panel Service Flap
   Procedure
   Unlock the retaining tabs.
2. Tail Lamp Nut
   CAUTION: Fastener Caution
   Tighten 2.5 N.m (22 lb in)
3. Tail Lamp
   Procedure
   1. Unlock the retaining tabs.
   2. Disconnect the electrical connector.
   3. Replace bulbs as necessary.

TAIL LAMP REPLACEMENT (5-DOOR WAGON 35)

1. Liftgate Lower Trim Finish Panel Service Flap
   Procedure
   Unlock the retaining tabs.
2. Tail Lamp Nut
   CAUTION: Fastener Caution
   Tighten 2.5 N.m (22 lb in)
3. Tail Lamp
   Procedure
   1. Unlock the retaining tabs.
   2. Disconnect the electrical connector.
   3. Replace bulbs as necessary.

REAR CLOSURE HANDS FREE LAMP REPLACEMENT (WITHOUT GS BUMPER)

Preliminary Procedure

Rear Bumper Valance Panel Replacement (Base).

1. Rear Closure Hands Free Lamp
   Procedure
   1. Disconnect the electrical connector.
   2. Unlock the retaining tabs.

REAR CLOSURE HANDS FREE LAMP REPLACEMENT (WITH GS BUMPER)

Preliminary Procedure

Rear Bumper Valance Panel Replacement (GS).

1. Rear Closure Hands Free Lamp
   Procedure
   1. Disconnect the electrical connector.
   2. Unlock the retaining tabs.

REAR COMPARTMENT COURTESY LAMP REPLACEMENT (5-DOOR HATCHBACK 68)

1. Rear Compartment Courtesy Lamp
   Procedure
   1. Unlock the retaining tabs.
   2. Disconnect the electrical connector.
   3. Replace bulbs as necessary.

REAR COMPARTMENT COURTESY LAMP REPLACEMENT (5-DOOR WAGON 35)

1. Rear Compartment Courtesy Lamp
   Procedure
   1. Unlock the retaining tabs.
   2. Disconnect the electrical connector.
   3. Replace bulbs as necessary.

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