GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Transmission 🢒 Automatic Transmission - 4T80-E 🢒 Automatic Transmission Fluid Pressure Test Hole Plug Replacement

Removal Procedure
  1. Remove the throttle body air inlet duct.

    2. Object Number: 784411 Size: SH
  2. Remove the oil pressure test plug (1).

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 784411 Size: SH
  1. Install the oil pressure test plug (1).

    2. Tighten
    Tighten the oil pressure test plug to 22 N·m (16 lb ft).

  2. Install the throttle body air inlet duct.