GM Service Manual Online
For 1990-2009 cars only

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.

The radiator pressure cap is located near the front of the engine compartment on the passenger's side of the vehicle. See Engine Compartment Overview for more information on location.