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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 121 (ENGINE CONTROLS - REMOVAL & INSTALLATION, OVERHAUL)IGNITION SYSTEMSKNOCK SENSORREMOVAL & INSTALLATION (2.2L)
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal & Installation (2.2L)

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal & Installation (2.2L)
WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Knock sensor is located on side of cylinder block. See Fig 1 . Turn ignition off. Disconnect negative battery cable. Raise and support vehicle. Disconnect starter wiring harness connectors. Remove starter bolts and starter. Disconnect knock sensor electrical connector. Remove knock sensor. To install, reverse removal procedure. Tighten knock sensor to specification. See TORQUE SPECIFICATIONS  .

Fig 1: Locating Knock Sensor (2.2L)
G00112752Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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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.