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 UnitRear Side Door Adjustment Panels
Warning:In order to prevent SIR deployment, personal injury, orunnecessary SIR system repairs, do not strike the door or the doorpillar in the area of the side impact sensor (SIS). Turn OFF theignition and remove the key when performing service in the area ofthe SIS.Remove the door striker. Refer to ...