Removal ProcedureRaise and support the vehicle. Refer toLifting and Jacking the Vehicle.

Remove the fill plug-(1).Installation Procedure

Clean the fill plug and apply adhesive GM-P/N-12345493 (Canadian-P/N-10953488) tothe threads.
Caution:Refer toFastener Caution.
Install the fill plug-(1) and tighten to 39-Y (29-lb-ft).Lower the vehicle.
Drain Plug Replacement Automatic Transmission Unit
Transmission Fluid Drain and Fill Automatic Transmission UnitLicense Plate Lamp Lighting Bulbs
Lamp AssemblyBulb AssemblyBulb SocketBulbLamp AssemblyTo replace one of these bulbs:Open the liftgate partway. SeeLiftgate.Push the left end of the lamp assembly toward the right.Pull the lamp assembly down to remove it from the liftgate.Turn the bulb socket (1) counterclockwise to remove it from th ...