2012 Buick Regal BaseFACTORY OEM SERVICE PROCEDURE

Knock Sensor Replacement

Fig 1: Knock Sensor
GM2579125Courtesy of GENERAL MOTORS COMPANY
Knock Sensor Replacement

Callout Component Name

Preliminary Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Disconnect and reposition the battery positive cable from the starter. Refer to Starter Replacement (LDK Or LHU) , Starter Replacement (LEA) .
1 Knock Sensor Bolt
CAUTION:

Refer to Fastener Caution .


Tighten 
28 N.m(18 lb in)
2 Knock Sensor
Procedure 
Disconnect the electrical connector.
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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.