GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Astro - 4WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Throttle Position Sensor Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.

    3. Object Number: 317362 Size: SH
  3. Remove the air inlet tube wingnut.

    4. Object Number: 315356 Size: SH
  4. Remove the air inlet tube.

    5. Object Number: 12885 Size: SH
  5. Disconnect the TP sensor harness connector.

    6. Object Number: 10935 Size: SH
  6. Remove the mounting bolts from the TP sensor.

    7. Object Number: 10936 Size: SH

    Notice: The TP sensor is an electrical component. Do not soak the TP sensor in any liquid cleaner or solvent as damage may result.

  7. Remove the TP sensor and gasket from the throttle body assembly.

Installation Procedure

    Object Number: 10936 Size: SH

    Important: Ensure the TP sensor throttle valve is closed.

  1. Align the TP flange holes with their corresponding holes in the throttle body assembly.
  2. Install the TP sensor by placing the TP sensor over the gasket onto the throttle shaft.

    3. Object Number: 10935 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 TP sensor mounting bolts.

    4. Tighten
    Tighten the bolts to 2 N·m (17 lb in).


    Object Number: 12885 Size: SH
  4. Connect the TP sensor harness connector.

    5. Object Number: 315356 Size: SH
  5. Install the air inlet tube.

    6. Object Number: 317362 Size: SH
  6. Install the air inlet tube wingnut.
  7. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.
  8. Connect the negative battery cable.