Notes: Intake Plenum Tube O-Ring;. Part Type: Fuel Injection Plenum Gasket. Fuel Inj Plenum Gkt. 2007 GMC Sierra 3500 HD Engine: 6.6L V8; Intake Plenum Tube O-Ring; Position: Upper;. 2008 GMC Sierra 3500 HD Engine: 6.6L V8; Intake Plenum Tube O-Ring; Position: Upper;.
