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 UnitInside Rearview Mirror Mount Plate Cover Replacement Trim Panels/Welts
Inside Rearview Mirror Mount Plate Cover ReplacementCalloutComponent Name1Inside Rearview Mirror Mount Plate InsertProcedureAdjust the mirror to the full downward position.Using a suitable plastic tool, insert the tool between the edge of the insert andthe headliner, turn the tool until the insert r ...