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.

2005 Cadillac CTS VFACTORY OEM SERVICE PROCEDURE

Removal Procedure

Fig 1: View Of TAC Module & Wiring Harness Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.

IMPORTANT:

Remove any debris from the throttle actuator control (TAC) module connector surfaces before servicing the TAC module. Inspect the TAC module connector gaskets if you diagnose or replace the TAC module. Verify that the gaskets are installed correctly. The gaskets prevent contaminate intrusion into the TAC module.
Do not touch the connector pins in order to prevent possible electrostatic discharge (ESD) damage to the TAC module.
The ignition should always be OFF if you install or remove the TAC module connectors.

Remove the electrical connectors from the TAC module (1, 2).
Remove the TAC module from the locking tabs on the relay center bracket.
Remove the module from the vehicle.

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.

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