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 UnitCooling System Draining and Filling (LEA) Engine Cooling
Special ToolsJ 26568Coolant and Battery Fluid TesterDraining ProcedureWarning:To avoid being burned, do not remove the radiator cap orsurge tank cap while the engine is hot. The cooling system willrelease scalding fluid and steam under pressure if radiator cap orsurge tank cap is removed while the e ...