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 UnitControl Valve Upper Body Assembly Cleaning and Inspection Automatic Transmission Unit
Control Valve Upper Body Assembly Cleaning and InspectionCalloutComponent NameWarning:Valve springs can be tightly compressed. Use care whenremoving retainers and plugs. Personal injury could result.Caution:After cleaning the transmission components, allow to air dry.Do not use cloth or paper towels ...