For 1990-2009 cars

### Removal Procedure

Notice: The throttle position (TP) sensor is an electrical component, and must NOT be soaked in any liquid solvent or damage may occur.

1. Remove the throttle body.
2. Remove the TP sensor attachment screws and the TP sensor.

### Installation Procedure

1. Clean the O-ring sealing surface and the throttle shaft.
2. Install the O-ring to the TP sensor.
3. With the throttle body valve closed, install the TP sensor over the throttle shaft. Install the TP sensor to the throttle shaft at a slight counterclockwise angle to the mounting bolts. Rotate the sensor clockwise to seat the alignment pin and align the mounting holes.

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.

4. Apply LOCTITE 242® Threadlocker (GM P/N 21485277) or equivalent to the attachment screw threads. Install the TP sensor attachment screws.

Tighten
Tighten the throttle position sensor to 2 N·m (18 lb in).

5. Assemble the throttle body to the intake manifold.