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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 434 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 5.3L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSKNOCK SENSOR REPLACEMENTREMOVAL PROCEDURE
2008 Pontiac Grand Prix Base

Removal Procedure

2008 Pontiac Grand Prix BaseSECTION Removal Procedure
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 Left Knock Sensor Electrical Connector
    GM1554554Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system. Refer to Cooling System Draining and Filling (LS4 GE47716 Fill) or Cooling System Draining and Filling (LS4 Static Fill) .
  2. Disconnect the left knock sensor electrical connector, if required.
    3. Fig 2: Identifying Left Knock Sensor
    GM1551881Courtesy of GENERAL MOTORS CORP.
  3. Remove the left knock sensor bolt, if required.
  4. Remove the left knock sensor, if required.
    5. Fig 3: Identifying Crankshaft Position (CKP) Sensor Electrical Connector
    GM1554552Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the right knock sensor electrical connector (2), if required.
    6. Fig 4: Identifying Right Knock Sensor
    GM1551882Courtesy of GENERAL MOTORS CORP.
  6. Remove the right knock sensor bolt, if required.
  7. Remove the right knock sensor, if required.
RENDER: 1.0x

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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.