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 UnitImmobilizer System Component Programming Immobilizer
This procedure will learn the immobilizer function. If the battery voltage is low,charge the battery before proceeding with the learn. If the body control module (BCM)or engine control module (ECM) have been replaced, they must be programmed beforeperforming this learn procedure.Depending on the imm ...