Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2005CHEVY EXPRESS H1500, VAN PASSENGERREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.3L - INTRODUCTION)REPAIR INSTRUCTIONSKNOCK SENSOR (KS) REPLACEMENTREMOVAL PROCEDURE

2005 Chevrolet Chevy Express H1500, Van Passenger

Removal Procedure

2005 Chevrolet Chevy Express H1500, Van PassengerSECTION Removal Procedure

WARNING: This page is about a different variant/trim than selected.

The knock sensor (KS) is located at the top rear of the engine.

CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.

Disconnect the negative battery cable.
Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.

Fig 1: Locating Knock Sensor & Retaining Bolt

Courtesy of GENERAL MOTORS CORP.

Disconnect the KS harness connector (3).
Remove the KS bolt (1).
Remove the KS (2).

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.