2009 Buick Allure CXFACTORY OEM SERVICE PROCEDURE

Rear Object Sensor Replacement

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Rear Object Sensor
GM1538331Courtesy of GENERAL MOTORS CORP.
Callout Component Name
Preliminary Procedures: 
Remove rear fascia. Refer to Rear Bumper Fascia Replacement .
1 Rear Object Sensor
Tip: 
  • Do not refinish previously painted sensors.
  • Press tab to release the sensor from the retainer.
  • Disconnect the electrical connector.
  • Paint the new rear object sensor. Refer to Basecoat/Clearcoat Paint Systems .
  • Using a paint thickness gage suitable for non-ferrous metals, ensure paint thickness does not exceed 6 mils. Refer to Paint Gages .
2 Rear Object Retainer
3 Rear Object Retainer
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.