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Inflatable Restraint Front End Sensor Replacement

WARNING: This page is about a different car, the 2007 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Inflatable Restraint Front End Sensor
GM1637879Courtesy of GENERAL MOTORS CORP.
Inflatable Restraint Front End Sensor Replacement

Callout Component Name
CAUTION: Do not strike or jolt the inflatable restraint front end sensor. Before applying power to the front end sensor make sure that it is securely fastened. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
NOTE: Refer to Fastener Notice .
Fastener Tightening Specifications:  Refer to Fastener Tightening Specifications .Preliminary Procedure: Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling .
1 Forward Discriminating Sensor Bolt (Qty: 2)
Tip:  Loosen the bolts in order to remove the sensor.

Tighten:  8 N.m (71 lb in)

2 Forward Discriminating Sensor
Tip: 
  1. Remove the connector position assurance (CPA) retainer.
  2. Disconnect the electrical connector.