GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1996 🢒 Riviera 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Throttle Position Sensor Replacement

Removal Procedure
  1. Remove the Manifold vacuum lines to throttle body and fuel pressure regulator.
  2. Remove the IAC, TP sensor, and MAF sensor electrical connectors.
  3. Remove the two TP sensor attaching screws.

Installation Procedure
  1. With the throttle valve in the normal closed idle position, install the TP sensor on the throttle body assembly, making sure the TP sensor pickup lever is located ABOVE the tang on the throttle actuator lever.
  2. Install the two TP sensor attaching screws, using a thread-locking compound on the screws. Loctite 262® , GM Part No. 1052624, or equivalent should be used.
  3. Install the IAC, TP sensor, and MAF sensor electrical connectors.
  4. Install the manifold vacuum lines to throttle body and fuel pressure regulator.