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 UnitPiston, Connecting Rod, and Bearing Removal Engine Block Cylinder Block Piston Assembly
Special ToolsEN 46121Connecting Rod Guide Pin SetFor equivalent regional tools, refer toSpecial Tools.Note:An arrow/dot showing proper piston orientation is located onthe top of the piston.If the connecting rod bearings have been used in a runningengine, you must replace them with NEW connecting rod ...