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 Unit#PIC5904: OnStar Account Issues Causing No Connect Concern - (Aug 20, 2013)
Subject:OnStar Account Issues Causing No Connect ConcernModels: 2002-2014 GM Passenger Cars and Trucks The following diagnosis might be helpful if the vehicle exhibits the symptom(s) describedin this PI.Condition/ConcernA customer may report they are not able to connect to OnStar on blue button ...