RacerJ, if the vehicle is a V6. I don't believe any from that year range came stock with an engine oil cooler. Though if it is an automatic transmission, the trans
lines do run through the radiator. Drive the car up to temperature, then pull the trans
dipstick, make sure there is no water in the transmission.
As said above, and in my 96 that I did a few weeks ago as well, it was the lower intake gasket. The lower intake is the casting of metal that sits just above the heads, but below the larger upper intake manifold. The air intake is the rubber tube running from the air filter up to the throttle body.