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 UnitValve Lifter Removal - Left Side
Note:Do not stroke/cycle the stationary hydraulic lash adjusterplunger without oil in the lower pressure chamber.Do not allow the stationary hydraulic lash adjuster to tipover, plunger down, after the oil fill.Remove the valve lifters (SHLAs) from the cylinder head. Ifthe lifters are to be reused, k ...