GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Impala 🢒 Engine 🢒 Engine Controls - 3.8L (L36 and L67) 🢒 Throttle Position Sensor Replacement

Removal Procedure
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.

    2. Object Number: 178680 Size: SH
  2. Disconnect the throttle position (TP) sensor electrical connector.

    3. Object Number: 178693 Size: SH
  3. Remove the 2 TP sensor screws.

    4. Object Number: 178694 Size: SH
  4. Remove the TP sensor.

Installation Procedure

    Object Number: 178694 Size: SH
  1. Install the TP sensor to the throttle body assembly.
  2. Apply thread-locking compound GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the TP sensor screws.

    3. Object Number: 178693 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the 2 TP sensor screws.

    4. Tighten
    Tighten the screws to 2 N·m (18 lb in).


    Object Number: 178680 Size: SH
  4. Connect the TP sensor electrical connector.
  5. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical-3.8L.