How to calibrate the Brake Light Switch after servicing on 2009 Buick Lucerne?

After servicing, the brake pedal position sensor must be calibrated by making sure that the brake pedal is not touched. Use the parking brake and put the transmission in PARK. To do the calibration of the brake system so that it communicates accurately, a scan tool is used to clear BCM DTCs, then follow the on-screen instructions in the Module Setup.

OEM 2009 Buick Lucerne Brake Light Switch

Brake Lamp Switch

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2009 Buick Lucerne Position Sensor Part Number: 20995840
$15.76 MSRP: $29.60
You Save: $13.84 (47%)
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Product Specifications
- Other Name: Sensor Assembly-Brake Pedal Position; Brake Light Switch; Clutch Switch; Stoplamp Switch; Safety Starting Switch; Hydraulic Clutch Switch; Engine Clutch Sensor; Brake Sensor.
- Replaces: 13348501, 92190131, 15223506, 25889337, 92220355
- Item Weight: 0.40 Pounds
- Item Dimensions: 3.8 x 3.5 x 1.7 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 20995840
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2009 Buick Lucerne Submodels:
- CX, CXL, CXL Special Edition, CXS, Super | 6 Cyl 3.8 L GAS, 6 Cyl 3.9 L FLEX, 6 Cyl 3.9 L GAS, 8 Cyl 4.6 L GAS

2009 Buick Lucerne Brake Light Switch

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2009 Buick Lucerne Brake Light Switch Parts and Q&A

Q: How to calibrate the Brake Light Switch after servicing on 2009 Buick Lucerne?
A: After servicing, the brake pedal position sensor must be calibrated by making sure that the brake pedal is not touched. Use the parking brake and put the transmission in PARK. To do the calibration of the brake system so that it communicates accurately, a scan tool is used to clear BCM DTCs, then follow the on-screen instructions in the Module Setup.