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.

2014 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Knock Sensor Replacement

Fig 1: Knock Sensor

Courtesy of GENERAL MOTORS COMPANY

Callout

Component Name

Preliminary Procedure

Raise and properly support the vehicle. Refer to Lifting and Jacking the Vehicle .
Remove the secondary air injection pump, if equipped. Refer to Secondary Air Injection Pump Replacement .

Knock Sensor Fasteners (Qty: 2)

CAUTION:

Refer to Fastener Caution .

Tighten
10 (89 lb in)

Knock Sensors (Qty: 2)
Procedure
Disconnect the electrical wiring harness connectors from the knock sensors.

Factory Service Tools

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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.