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.

2004 Pontiac GTO AutomaticFACTORY OEM SERVICE PROCEDURE

Removal Procedure

Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
Remove the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical-5.7L.
Remove the wiring harness assembly for the knock sensor.

Fig 1: Knock Sensor Wiring Harness Assembly
Courtesy of GENERAL MOTORS CORP.

Fig 2: Identifying Knock Sensors

Courtesy of GENERAL MOTORS CORP.

Remove the knock sensor.

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.