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.Cylinder Head Cleaning and Inspection Engine Block Cylinder Head
Special ToolsGE 8001Dial Indicator SetGE 8358Carbon Removal BrushEN 28410Gasket RemoverEN 42096Valve Guide ReamerEN 47909Injector Bore and Sleeve Cleaning KitFor equivalent regional tools, refer toSpecial Tools.Cleaning ProcedureRemove any old thread sealant, gasket material or sealantusingEN 28410r ...