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 Description and Operation Immobilizer
K89Immobilizer Control ModuleK9Body Control ModuleP16Instrument ClusterK20Engine Control ModuleThe immobilizer system functions are provided by the body control module (BCM) andthe engine control module (ECM), as well as any control modules which store and reportthe environment identifier.When an ig ...