GM Service Manual Online
For 1990-2009 cars only

Radiator Pressure Cap 3.8L V6 Engine

Notice: The radiator cap on your vehicle is a pressure-type cap and must be tightly installed to prevent coolant loss and possible engine damage from overheating. Be sure the arrows on the cap line up with the overflow tube on the radiator filler neck.

See Engine Compartment Overview for more information on location.