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 UnitChannel Plate to Valve Body Spacer Plate Assembly - Channel Plate Side Automatic Transmission Unit
Channel Plate to Valve Body Spacer PlateAssembly-–-Channel PlateSide(2)Line(9)Regulated Apply(10)Exhaust Backfill(11)Actuator Feed Limit(12)PCS Line(13)PCS R1/456 Clutch(14)Shift Solenoid(15)R1/456 Clutch Feed(16)R1/456 Clutch Feedback(18)PCS 35 Reverse Clutch(19)Reverse(20)35 Reverse Clutch Feed( ...