OEM Buick Lucerne Throttle Body

Buick Lucerne Throttle Body Parts and Q&A

• Throttle Body
  12615495
  Q: How to replace the throttle body assembly on Buick Lucerne?

  A:

  The first step in replacing the throttle body assembly requires complete removal of the air cleaner outlet duct alongside the secondary air injection (AIR) feed tube if you have it. Remove the engine harness electrical connector from the throttle actuator before loosening throttle body bolts to extract the throttle body assembly nuts. Secondly remove the throttle body while keeping the seal in position. Installation involves putting back the throttle body and seal into position but first apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the nuts before screwing them in. After reconnecting the engine harness electrical connector to the throttle actuator, tighten the throttle body bolts/nuts to 10 N.m (89 lb in). Reinstall the AIR feed tube if equipped, followed by the air cleaner outlet duct.
• Throttle Body
  19420718
  Q: What cleaning procedure should be followed for the throttle body, and what precautions should be taken regarding mileage on Buick Lucerne?

  A:

  The throttle plate develops deposit buildup over distance and mileage without significant problems but can restrict valve movement when the accumulation becomes extensive. Car owners should avoid throttle body cleaning when their vehicle operates below 80 450 km (50,000 mi). First detach the air cleaner outlet duct before examining the throttle body bore and throttle body plate for deposits while making sure the throttle plate remains open to see all areas properly. Addition 1: Use GM top engine cleaner (P/N 1052626) or AC Delco Carburetor Tune-up Conditioner (P/N X66P) or equivalent cleaning agent to clean the bore and plate with a clean shop towel. Place the air cleaner outlet duct back before completing the process.