On a 2003 Chevrolet Tahoe, the throttle actuator control module (TACM) is mounted on the throttle body of the electronic throttle control system. In practice you’ll find it as a small rectangular module bolted to the side of the throttle body, with a multi‑pin electrical connector. Access typically requires removing part of the air intake ducting to reach the throttle body, which sits at the end of the intake manifold on the engine.
Location and how to access it
The TACM is attached directly to the throttle body. To reach it, start at the air intake box and follow the intake tube to the throttle body, which is the metal housing that houses the throttle plate. The TACM is the small black or dark‑gray box mounted to the side of the throttle body, secured with screws or bolts and connected by a multi‑pin electrical connector. On some older GM setups, the TACM is integrated into the throttle body itself, so you may need to replace the entire throttle body assembly rather than a separate module.
Before attempting any inspection or removal, ensure the engine is off and the negative battery terminal is disconnected to prevent unintended electrical shorts.
Below are the practical steps to locate and inspect the TACM on a 2003 Tahoe:
- Disconnect the negative battery terminal to prevent electrical shorts.
- Remove or loosen the air intake ducting or resonator to expose the throttle body.
- Identify the throttle body at the end of the intake manifold; look for a small rectangular module bolted to its side—the TACM.
- Inspect the TACM’s electrical connector for corrosion, bent pins, or a loose connection.
- If you need to replace, unplug the harness, remove the mounting screws, and swap in a new TACM or throttle body assembly as required.
- Reattach the electrical connector, reinstall the air intake components, reconnect the battery, and clear any stored codes if needed.
In summary, the TACM on a 2003 Tahoe is located on the throttle body itself. Accessing it usually requires removing the air intake tube to clearly see the throttle body and the module bolted to its side. If the throttle body has an integrated TACM, the entire throttle body assembly will be replaced rather than a separate module.
Summary
For a 2003 Tahoe, locate the throttle actuator control module on the side of the throttle body, beneath the air intake ducting. If you’re diagnosing throttle control issues, check the TACM’s mounting, connector integrity, and whether the throttle body assembly may need replacement rather than a separate TACM. Always take proper safety precautions, including disconnecting the battery, before handling electrical components.