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 Cleaning and Inspection Engine Block Cylinder Block Piston Assembly
Cleaning ProcedureNote:DO NOT wire brush any part of the piston.Clean the piston skirts and the pins with a cleaningsolvent.Clean the piston ring grooves with a groove cleaner. Ensurethat the oil ring holes and slots are clean.Warning:Refer toSafety Glasses Warning.Dry the piston with compressed air ...