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 UnitFastener Tightening Specifications - Propeller Shaft Assembly Driveshafts Propeller Shaft Assembly
Fastener Tightening SpecificationsApplicationSpecificationMetricEnglishCenter Bearing-to-Vehicle Underbody Bolts25-Y19-lb-ftPropeller Shaft-to-Rear Differential Flange Bolts50-Y37-lb-ftPropeller Shaft-to-Transfer Case Flange Bolts35-Y25-lb-ft ...