1993 Pontiac Grand Am head

Head gaskets are done in the car, but GM is famous for making cars that go together quickly on the assembly line. There's little thought toward future service. That is especially true if you have a V-6 engine.

You'll want to take the head to an engine machine shop to have it checked for flatness and cracks. Cracks are pretty rare but if the head is warped it will need to be machined. On engines with the camshaft in the head, those warped heads have to be heated and straightened. Machining the sealing surface will leave the camshaft journals out of alignment. It's less expensive in that case to just buy a remanufactured head.

I'd love to send a diagram but I've never been able to get into the Mitchell site. Something on my computer is blocking it. If you plan on keeping the car a while and doing your own work, by far the best resource is the manufacturer's service manual. You can find them on eBay. I bought a lot of manuals from "lorieandjeff". I think their new name is "blackhatauctions". Just type in your car year and model in the search box.

Which engine do you have?

There's two versions of that engine. Do you know if you have the single camshaft engine or dual cam engine? Does the camshaft sit on the top of the head right under the valve cover?